Maija N. Williams, BA, MPH is the Chief Operating Officer at The Rockefeller University Hospital and Administrative Director for The Rockefeller Center for Clinical and Translational Science (RUCCTS). She has more than 22 years’ experience in healthcare management as a professional non-profit healthcare administrator. At Rockefeller Ms. Williams in conjunction with the center and hospital leadership is responsible for planning and executing the preparation of competing and non-competing grant applications, and compiling operational, financial, and clinical research data for the Center’s annual report to the institution and funding agencies. Ms. Williams reviews budgetary requirements to appropriately reflect program needs and provides oversight monitoring and analysis of university budget funding and National Institute of Health (NIH) grant funding. Ms. Williams is a member of the American Public Health Association , American College of Health Care Executives, Health Care Leaders of New York, and the National Association of Health Services Executives. Currently Ms. Williams serves as a member of the UMASS Center for Clinical and Translational Science external advisory board, Chair Healthcare Leaders of New York Diversity, Equity, and Inclusion Committee, and member of the American Public Health Association nominations committee. Ms. Williams is the recipient of the 2021 ACHE regent award for Volunteer Executive, 2020 Excellence in Health Administration Award recipient from The American Public Health Association Health Administration section, and she currently serves as Governing Councilor of the Health Administration section. Ms. Williams holds a B.A. in Sociology from the State University of New York at Binghamton, a master’s degree in Public Health from New York University, and certification in Health Care Executive Management from the University of California, Los Angeles.

Camille’s career journey began over a decade ago at Healthcare Leaders of New York’s (HLNY) “Cocktails with the Chief” event. There, she connected with Mr. Stephen S. Mills, then CEO of NY Hospital Queens, whose mentorship became a cornerstone of her professional development.
Since that pivotal moment, Camille has held significant leadership roles across the NYC and Long Island regions. She began her career managing critical hospital-wide projects alongside senior leadership and progressed to her current role as the Administrator for the Departments of Surgery and Anesthesiology at NYU Langone Hospital – Long Island. In this capacity, she oversees over 300 employees and manages one of the institution's largest budgets, including operating, personnel, and capital expenditures.
Camille’s motivation to serve as a Board Member at Large for Long Island stems from her deep appreciation for HLNY’s impact on her career. She is passionate about guiding future healthcare leaders toward similar opportunities for growth and success.

Dr. E. J. Imafidon, DPT, FACHE, is a Healthcare Executive with over two decades of healthcare management experience. He is currently the Senior Director of Ambulatory Operations and Business Development at White Plains Hospital, part of the Montefiore Einstein Health System. He leads ambulatory operations for multiple multi-specialty outpatient practices across Westchester County.
Before joining White Plains Hospital, Dr. Imafidon was the Assistant Vice President of Women’s and Children’s Operations at St. Barnabas Hospital (SBH) Health System, where he managed inpatient and ambulatory services. He started as a clinical physical therapist and advanced to leadership roles, including serving as a licensed assistant administrator of a 199-bed nursing home and rehabilitation center. He provided operation and project management leadership for several healthcare initiatives, including a 50,000 sq ft SBH Health and Wellness Center (women's and children’s practices, urgent care, fitness center, rooftop farm, and farmer’s market). He oversaw system upgrades for radiology services (Cardiac Cath & Breast biopsy lab, MRI, and CAT scan).
Dr. Imafidon has been an active member of the American College of Healthcare Executives (ACHE) and the Healthcare Leaders of New York (HLNY) since 2013. His contributions include serving on the ACHE Membership and Giving Committee, which have helped grow ACHE's membership to over 50,000 and raise over $4 million for the Foundation of ACHE's Fund for Healthcare Leadership. He also serves on several community boards, showcasing his commitment to healthcare and the community.
Dr. Imafidon’s commitment to professional development is evident through his educational achievements, which include a Doctor of Physical Therapy (DPT) degree from the New York Institute of Technology, a BS from Fordham University, and an MBA from Iona University. He also holds certifications as a licensed Nursing Home Administrator (NHA) and Project Management Professional (PMP) and is a Fellow of the American College of Healthcare Executives (FACHE).

Natasha Elie Louissaint is a Queens, New Yorker native. She pursued a Bachelor in Health Administration from SUNY at Stony Brook, a Master in Health Administration from Hofstra University, and a Bachelor of Nursing from the University of Rhode Island. She continued her attainments by earning the credential LNHA – Licensed Nursing Home Administrator and Registered Nurse. She is currently pursuing her Doctoral in Health Care Leadership with a focus on advance care planning.
In her past roles, she played an integral role in the management of $50-75m business portfolios. She has been successful in implementing programs and transitions that assisted in patient care as well as satisfaction. She has had great success in revenue enhancement, leading capital projects, and submission of certificate of need applications for engineering, facilities as well as patient care services. She has managed the construction of ambulatory/wound care clinics, outpatient rehabilitation, transitional care departments, and Senior Housing Apartments.
She has earned many accolades in her career for reducing costs, while increasing revenue as well as satisfaction scores by targeting direct opportunities. As a nurse, she has been able to empathize the needs of the clinical team while meeting the necessities of the operational team. She wrote and submitted a New York State transformation grant that was awarded for clinical non-invasive monitoring. The clinical non-invasive monitoring assisted the clinicians with the early detection of changes in the condition of a patient, which has directly impacted the reduction in readmissions to the hospital.
Natasha is a Fellow of the American College Healthcare Executives (FACHE) and Sigma Theta Tau International Honor Society. Additionally, she continues to be active in the New York Community by assisting with local health fairs, health care awareness, mentoring young health care leaders and she is an active Girl Scouts Leader for young girls in her community. Natasha is married to Kervens and they are raising three children to be future leaders.

Ramsey Abdallah is the Assistant Vice President of Quality and Performance Improvement for the Northwell Health Physician Partners ambulatory network. With deep expertise in program development, performance improvement, project management, and data analytics, Ramsey drives transformative initiatives that advance clinical quality and operational excellence.

In his role, Ramsey leads strategic improvement programs and analytics for the ACO, including Northwell Health’s system transformation project aimed at enhancing ACO measures and clinical outcomes. He also spearheads the health system’s eCQM implementation program, aligning quality standards with digital reporting advancements.A passionate mentor and advocate for professional growth, Ramsey supports early and mid-careerists through Northwell Health’s Mentorship & Professionalism in Training program and the ACHE Leadership Mentoring Network. Nationally, he contributes to advancing healthcare quality as a member of the NAHQ Item Writer’s Workgroup, PQM Endorsement and Maintenance Primary Prevention Advisory Council, IHI Exam Review Group, NQF Leadership Consortium, and NAACOS eCQM Implementation Workgroup. Locally, he serves as Co-Chair of the Programs Committee for the NY ACHE chapter, Healthcare Leaders of New York.

Ramsey holds a Doctorate in Healthcare Administration with a focus on leadership, an MBA in Healthcare Administration, and an Executive Leadership Certificate from Cornell University. He is a Certified Professional in Healthcare Quality (CPHQ), Patient Safety (CPPS), Project Management (PMP), and Quality Management/Organizational Excellence (CMQ/OE), and is a Fellow of the American College of Healthcare Executives (FACHE).

Precelia Morgan serves as the Associate Director for Ambulatory Care at New York City Health + Hospitals, where she specializes in Revenue Integrity, Capture and Sustainability, and Continuous Improvement. In this role, Precelia drives strategic initiatives and process enhancements across Ambulatory Care departments and clinics, ensuring exceptional revenue cycle management and operational excellence.
Precelia previously served as the Associate Director of the World Trade Center Program at New York City Health + Hospitals, where she partnered with senior leaders, administrators, and clinicians to implement initiatives that enhanced the patient experience and supported the program's growth. Her earlier tenure includes a role as Administrator on Duty (AOD) at Bellevue and Lincoln hospitals, overseeing off-tour operations at Bellevue’s 912-bed facility.
A dedicated professional, Precelia is actively involved in organizations such as the American College of Healthcare Executives (ACHE), Healthcare Leaders of New York (HLNY), the National Association of Health Services Executives (NAHSE), and the NAACP. She has been a member of HLNY for 14 years and currently serves as Co-Chair of its Program Committee. Also a member and past board participant of NAHSE, Precelia has held various leadership roles and is a proud graduate of its Mentorship Program, where she served as a mentor to graduate students.
Precelia holds a Bachelor of Science in Health Sciences from Mercy College and a Master’s Degree in Community Health from Long Island University.
Committed to advancing healthcare excellence, Precelia leverages her leadership, innovation, and dedication to improving patient outcomes. Beyond her professional achievements, she remains passionate about volunteering and giving back to her community.

Alyssa Alario is the Senior Manager, Marketing & Communications, at The Mount Sinai Hospital. Alyssa is responsible for local marketing and communications of The Mount Sinai Hospital (MSH), with additional responsibilities at Mount Sinai Queens.
She is responsible for the development and oversight of site-specific marketing and communications campaigns, projects, and budgets. Alyssa oversees internal communications, digital strategy, social media, and more, working closely with senior leadership while partnering with her marketing department.
Most recently, Alyssa was the Corporate Communications Manager for IPG Health, a global healthcare advertising network with clients spanning pharmaceutical, biotech, and life science industries. Alyssa previously served in numerous roles within the Marketing & Communications Department of Maimonides Medical Center in Brooklyn.
Alyssa is an active member of the American College of Healthcare Executives (ACHE) and Society for Health Care Strategy and Market Development (SHSMD), as well as an advisory board member for Fairleigh Dickinson University’s Becton College of Arts and Sciences.
She holds a Master’s Degree in Corporate and Organizational Communications, and a Bachelor’s Degree in Communication Studies with a minor in Public Relations from Fairleigh Dickinson University.

Recently graduating with a dual master's degree in Business Administration and Public Health, with a concentration in health policy and management from Stony Brook University, Mmutaka brings a wealth of knowledge and dedication to her work in Healthcare Administration. Mmutaka also holds a Bachelor's degree in Public Health from the State University of New York Albany, laying a strong foundation for her endeavors.

Mmutaka's dedication to academic excellence and commitment to public health has been recognized through several scholarships, including the Stony Brook Program in Public Health's Ann Tempone Award, the New York Regional Chapter of the National Association of Health Services Executives 2023 Scholarship Award, and the HLNY 2023 Achievement Award of Distinction Scholarship.

Since 2021, Mmutaka has been an active member of HLNY, initially joining as a student member and then volunteering within the DEI committee before now serving as the Co-Chair of the Marketing Committee.

Post-graduation, Mmutaka will join Northwell Health as an Administrative Fellow. This role will provide her with a unique opportunity for executive development, encompassing departmental rotations, problem-solving projects, and participation in managerial functions across various organizational settings within Northwell Health.

Beyond her professional pursuits, Mmutaka finds balance in her life through activities such as going to the gym, exploring all things beauty related, and spending time with family and friends.

Jeena Velzen serves as an Associate Director for the Transformation Management Office at Memorial Sloan Kettering Cancer Center, focusing on Enterprise Continuous Improvement. In this role, she works alongside a team of process improvement engineers to enhance quality, patient safety, and system performance. Guided by principles of systems thinking, collaboration, and a commitment to continuous learning, Jeena contributes to addressing complex challenges that impact patients and staff.

With a background in mechanical engineering (BSE) and advanced degrees in industrial engineering & operations management (MSc) and human factors & ergonomics (PhD), Jeena brings a balance of technical knowledge and human-centered approaches to her work. She has been fortunate to engage in a range of initiatives, from early discharge programs and clinic workflow optimization to supporting MSK’s transition to Epic. She has received certification as a Lean Six Sigma Black Belt and Prosci Change Practitioner.

An active participant in the healthcare community, Jeena values the opportunity to give back through leadership roles with the HLNY Chapter. Since joining in 2020, she has contributed as Chair of Analytics and Chair of Membership, supporting membership growth and engagement. In 2024, she was honored to receive the ACHE Regent’s Early Career Healthcare Executive Award, a recognition she shares with the mentors and colleagues who inspire her.

Jeena remains driven by a desire to foster collaboration, support meaningful change, and mentor others, believing that healthcare transformation is most successful when it is built on shared effort and learning.

Kayla Spence is a dedicated healthcare leader with over a decade of experience in hospital operations, population health, and value-based care. Passionate about advancing equity, quality, and innovation, she focuses on serving underserved communities and driving impactful change in healthcare systems.
In her current role as Director of Value-Based Payment Programs at NYC Health + Hospitals, Kayla leads initiatives designed to improve patient outcomes and achieve cost savings across the nation’s largest municipal health system.
Previously, Kayla served as the Associate Director of Clinical Services at NYC Health + Hospitals/Elmhurst, where she oversaw Rehabilitation Services, Orthopedics, Neurosciences, and Admitting at the 545-bed Level 1 trauma center. During her tenure, she helped lead Elmhurst in becoming a Thrombectomy-Capable Stroke Center and achieving certification from The Joint Commission as an Advanced Total Hip and Knee Center. During the COVID-19 pandemic, she worked in the Command Center, ensuring operational continuity while the hospital was at the crisis’s epicenter.
Before joining Elmhurst full-time, Kayla worked per diem as an Administrator on Duty (AOD). There she was responsible for after-hours operations of the facility. While working as an AOD, Kayla simultaneously held a full-time position at Maimonides Medical Center in the Department of Population Health. There, she developed and implemented transitional care and care management programs under the New York State Medicaid 1115 waiver and subsequent value-based arrangements with several Medicaid managed care plans and CMS.
Kayla holds a master’s in healthcare administration from Seton Hall University and a bachelor’s degree from St. John’s University.

Ramya Geddam is the Hospital Services Manager for LiveOnNY, a nonprofit organization committed to helping New York live on through organ and tissue donation. In this role, she utilizes data analytics to prepare and present at multidisciplinary meetings with executive leadership teams of hospitals throughout the greater NYC area and its neighboring counties. She also coordinates the strategic development and implementation of programs to achieve the metrics set forth. She is a clinically strong, foreign-trained physician motivated to integrate clinical knowledge into the administrative side. Ramya also has experience as a health ambassador and a content manager promoting safe community events and delivering National Public Health Week events to the students at Hofstra University.
Ramya holds a Bachelor of Medicine and a Bachelor of Science from NRI Medical College. Ramya also graduated as part of the Upsilon Phi Delta Honor Society while completing her Master of Health Administration from Hofstra University. During her time at Hofstra, she was proud to serve as the President of Future Healthcare Leaders, bringing the student body together by hosting educational workshops that were also presented as networking opportunities. Ramya has been part of HLNY, attending events and volunteering since 2021 and being a Co-Chair of the Gala committee in 2024 and is grateful to continue in this position.

Saumya Mamgain is the Senior Specialist in the Department of Quality Management and Performance Improvement at Lenox Hill Hospital, Northwell Health. She plays a key role in the identification of opportunities for improvement of patient care and implementation of strategies to promote patient safety. She is a skilled process improvement specialist in a hospital based setting, who is also a part of the regulatory workgroup at Lenox hill. In this role she assumes the responsibility to help the hospital with maintaining and increasing CMS STAR rating as well as with advanced certifications for the hospital. She has a background in dental surgery and completed her Masters in Healthcare Administration from Hofstra University in 2018.
She has been a part of HLNY since 2017 and was a member of the Marketing Committee and the Co-chair for the programs committee prior to her current roles as the Gala Committee Co-Chair.

Jonathan Acevedo is a Senior Operations Associate at Mount Sinai Health System, where he works alongside executive and department leadership to improve efficiencies and drive financial stewardship throughout the organization. Jonathan joined Mount Sinai in 2014, as a Program Assistant and has worked in numerous departments, including the Adolescent Health Center, Human Resources and Population Health.
Jonathan holds a Bachelor of Science in Psychology and Computer Art from State University of New York at Oneonta and received his Master’s in Business Administration from the Zicklin School of Business. Jonathan also holds a Project Management Professional credential form the Project Management Institute. Jonathan has been a member of HLNY since 2023 and has served on the Sponsorship Committee since 2024. Jonathan is excited to now serve as Co-Chair of the Sponsorship Committee and serve our clients in driving the value of sponsorship.

Carla Sison currently serves as the Director of Operations, Office of Patient Centered Care, Nursing Administration at New York City Health + Hospitals. In her role, she supports the system’s Chief Nursing Executive in special projects and various system nursing initiatives. She actively participates in various nurse leader workgroups advocating for mentoring, professional development, continuing education, and retention programs. In addition, she works hand in hand with the Equity and Access council chair to set up the various workplace inclusion groups connecting employees around shared interest, race, ethnic, or identity.
Prior to joining NYC Health + Hospitals, Ms. Sison worked directly with the Chief Nursing Officer at Mount Sinai Morningside. As Project Manager, she was responsible for implementing various nursing led initiatives and rolling out special projects that impacts patient experience, patient safety and quality, and operational efficiencies. She was Co-chair of the Rewards, Recognition, and Retention Committee, and Co-Chair of the Asian American Pacific Islander Employee Resource Group at Mount Sinai Morningside.
Ms. Sison has been in leadership roles for over 20 years and has transitioned to healthcare from the financial industry with expertise in streamlining operations through strategic initiatives, project management, research, and timely execution. She was previously Vice President at Coleman Research Group, a leading expert network and brokerage of knowledge, facilitating short-term consulting engagements between management consultancies, mutual funds, hedge funds, private equity firms, and experts across all industries.
Ms. Sison holds a Master’s degree in Business Administration from St. John’s University and certificates in Healthcare Executive Leadership and Strategic Planning and Initiatives at Cornell University.

Nancy Gonzalez serves as Diversity, Health Equity & Inclusion (DEI) Program Manager for the Mount Sinai Health System (MSHS) Department of Medicine. Ms. Gonzalez works with the Vice Chair for DEI and other administrative leaders in the Department to plan, implement and evaluate programming initiatives that promote equity inclusive excellence for faculty, trainees, staff and patients. Ms. Gonzalez has held several previous positions with the Department of Medicine including Residency Program Coordinator for the Internal Medicine Residency Program at Mount Sinai Hospital, Education Program Manager for the Nephrology Fellowships and the Mount Sinai Morningside/West Internal Medicine Residency and Diversity, Equity & Inclusion coordinator.

Ms. Gonzalez is a graduate of Berkeley College where she completed a Bachelor of Business Administration in Management and postgraduate of Robert F. Wagner Graduate School of Public Service at New York University Master of Health Administration program. She currently holds the position of Adjunct Associate Professor in the Department of Health Sciences at Long Island University's Brooklyn Campus.

health care consulting experience for hospitals, health systems, ambulatory networks, and FQHCs. In his current role, he leads accounts across various products and solutions, supporting clients develop and deliver strategies to succeed in value-based care structures. Mr. Hefter is an experienced consultant in strategy and process transformation, care model redesign, and revenue cycle optimization and compliance. Other skills include project and client relationship management, data analysis, and workflow development.
Prior to joining COPE Health Solutions, Mr. Hefter served as an Experienced Senior Associate at BDO USA LLP. In this role, Mr. Hefter assisted health care providers improve financial and operational performance through operational compliance assessments, strategic policy report development, merger and acquisition due diligence, and revenue cycle evaluation. Specific expertise includes designing and implementing a compliance program covering ambulatory revenue cycle operations and performing assessments for specific service lines to identify resource, technology, and process-related gaps for various providers.

Mr. Hefter has been a member of Healthcare Leaders of New York (HLNY) since 2019 and has served on the Analytics committee since 2022.

Mr. Hefter earned his Bachelor of Arts in Economics and Public Health from Tufts University in Medford, MA and his Master of Public Health degree from the Columbia University Mailman School of Public Health in New York. In addition, Mr. Hefter earned his Project Management Professional (PMP) certification in March 2023.

Aditya Bissoonauth serves as the Director of the Family Medicine Service Line at Northwell Health, overseeing the administration, clinical operations, academics, research, global health initiatives, and growth initiatives. He collaborates closely with executive leadership to expand and enhance Family Medicine services within the organization, throughout local communities, and with global stakeholders to improve accessibility and health outcomes.
In addition to his leadership role, Mr. Bissoonauth holds dual academic positions. He is an Assistant Professor of Family Medicine at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell and as an Assistant Professor of Population Health (Adjunct) in the Department of Population Health at Hofstra University. Mr. Bissoonauth is also the Assistant Program Director of Hofstra’s Master of Public Health Program. His teaching responsibilities span across undergraduate Health Sciences and Community Health programs, as well as graduate Public Health studies. Additionally, he works with medical students, Family Medicine residents, and undergraduate/graduate students, advancing workforce development, mentorship, leadership, and academic excellence in future healthcare professionals.
Mr. Bissoonauth earned his bachelor’s degree in Toxicology from St. John’s University, followed by Master of Public Health and Master of Business Administration degrees from Hofstra University. Currently, he is pursuing a Doctor of Public Health degree at the Johns Hopkins Bloomberg School of Public Health focused on healthcare leadership and management. Mr. Bissoonauth has been a member of the American College of Healthcare Executives (ACHE) since 2020.

Katherine Sanchez is a passionate healthcare leader dedicated to advancing health equity and promoting the true potential of all individuals. As Co-Chair of the Higher Education Network at Healthcare Leaders of New York (HLNY), she connects her practical experience with a commitment to mentorship and education. Katherine holds a Bachelor's degree from York College (CUNY) and a Master's in Healthcare Administration from Hofstra University.

Katherine's journey in healthcare has provided her with a foundational understanding of its complexities. Witnessing healthcare disparities within her Queens community inspired her to become a champion for change. She has held various roles within Northwell Health, including Administrative Fellow.

Katherine's commitment to health equity extends to her mentorship of young professionals, where she provides one-on-one guidance, resume building support, and coaching to develop crucial workplace skills.

As an active member of the National Association of Latino Healthcare Executives (NALHE) and Co-lead of the new members committee for the Women in Healthcare BERG at Northwell, Katherine fosters inclusive leadership and promotes access to resources. She is currently a Program Manager in Health Management, working alongside clinical and executive leaders to develop impactful programs addressing health disparities. She is driven by a deep desire to create opportunities for all to thrive and believes that education and accessible healthcare are intrinsically linked, each supporting the other in helping individuals achieve their full potential. Katherine is eager to share her experiences and insights with students and educational programs to inspire the next generation of healthcare leaders.

Kirk Castillo is the Senior Operations Manager at the Mount Sinai Hospital, where he oversees dialysis technical operations, supply chain management and regulatory compliance. With over a decade of experience in dialysis operations, Kirk has cultivated a transformative culture that has resulted in significant process improvements and successful regulatory site visits across multiple hospital dialysis centers and private outpatient units. He also leads CMS and Joint Commission regulatory surveys with consistently high success rates. Kirk's skill set includes leadership, project management, supply chain management, and finance. Prior to joining Mount Sinai Hospital, Kirk held leadership roles at Sound Shore Medical Center and the Brooklyn Hospital Center. He holds an MBA in Healthcare Administration and is a Fellow of the American College of Healthcare Executives.

Maxine L. Legall, MBA, MSW, CPXP, brings over 20 years of dynamic experience driving organizational development and transformation across healthcare, non-profit, and corporate sectors. As founder and CEO of Thrive Inclusively LLC, based in New York, Maxine is dedicated to empowering healthcare and non-profit leaders and organizations to achieve their full potential. Thrive Inclusively specializes in fostering growth through diversity, equity, and inclusion strategies, cultural transformation, and leadership growth and development.
Previously, Maxine served as Chief Diversity, Equity, and Inclusion Officer at The Jewish Board, where she played a pivotal role in advancing strategic diversity initiatives. Her leadership also extended to Mount Sinai Morningside as Director of Patient Experience & Cultural Transformation, where she developed impactful patient experience programs and collaborated on initiatives to elevate patient care standards.
Maxine holds an MBA in Health Service Management from Hofstra University, an MSW in Advanced Generalist Practice and Programming from Columbia University School of Social Work, and a cum laude bachelor’s degree in psychology with minors in Sociology and Black Studies from the State University of New York.
Passionate about teamwork, inclusion, empathy, engagement, and strong leadership, Maxine exemplifies a commitment to driving positive change and achieving collaborative success.

Benoit Grandmougin is a board-certified Healthcare Executive with over 25 years of provider and payor experience. Mr. Grandmougin is an Executive Director at Equidis Health, a value-based solutions organization based in New York City. Prior to Equidis Health, Mr. Grandmougin was the Executive Director at UnitedHealth Group (UHG) for Medicare Operations in Downstate New York. He was responsible for defining and executing the overall market strategy for plan performance including, quality, coding, clinical affordability and member experience. In addition, he executed Medicare & Retirement national functions in the local market specific to network and product development, sales, marketing, and finance. Prior to UHG, Mr. Grandmougin was a Provider Engagement Executive at Humana, responsible for value-based contract performance in New York City and Long Island. Additional experience includes managed care leadership roles at Northwell Health and Mt. Sinai Health System and Emory Healthcare, where he oversaw contracting and business development strategies, payer relations and contract negotiations, health care economics and analytics, and value-based contracting.

Mr. Grandmougin previously served a two-year term as HLNY Board Member-at-Large for the Long Island territory. Additionally, he volunteers with the New York City Medical Reserve Corps.

Mr. Grandmougin earned a Bachelor of Science degree in Healthcare Administration from St. John’s University, a Master in Public Health from the University of Tennessee, and a Master in Healthcare Administration from Hofstra University. He is currently a Ph.D. student in Health Sciences at Seton Hall University.

Navesh has been a member of ACHE/HLNY for nearly a decade, leveraging the organization to deepen his understanding of the healthcare landscape in the New York tri-state area. His experience has provided valuable insights into the complexities, opportunities, and challenges unique to the region and the diverse communities it serves.
As a physician who transitioned to the business side of healthcare, Navesh has spent the last 15 years working in the vendor space. This shift has given him a comprehensive understanding of the healthcare ecosystem, encompassing clinical, operational, technical, and financial perspectives. This multifaceted expertise allows him to support leaders and team members at all organizational levels effectively.
Over the years, Navesh has been an active ACHE/HLNY member, Fellow, and corporate partner, contributing to the advancement of healthcare leadership and aligning with the core values and mission of ACHE. His involvement has extended to a national audience, enabling him to understand the priorities of health systems across the country and to support ACHE/HLNY’s initiatives on a broader scale.
Most recently, Navesh served on the FACHE Advancement Committee for 2024 and has volunteered for various HLNY events over the years, demonstrating his commitment to fostering professional growth and collaboration in healthcare leadership

Frankie Hamilton is a board-certified healthcare leader with 13 years of nursing experience, including 10 in leadership roles, managing diverse clinical areas and service lines. His career began at Long Island Jewish Medical Center as an Assistant Nurse Manager on a stroke unit, later advancing to roles at Lenox Hill Hospital and as a Sepsis Quality Specialist, where he drove performance improvement initiatives. Frankie then served as Assistant Director of Nursing at LIJ Valley Stream and Nurse Administrator at NYP Cornell, overseeing hospital-wide operations and ensuring quality care.

In the U.S. Navy Reserve, Frankie was deployed to Guantanamo Bay, Cuba, providing care to detainees. Returning stateside, he became Deputy Chief Nursing Officer at NYCHHC/Lincoln, overseeing med/surg, critical care, maternal child health, and behavioral health nursing. Later, as Director of Ambulatory Care Services, he managed operations across 76 practices, radiology, dialysis, and oncology. Frankie currently works as a per diem Nurse Administrator while seeking a leadership role to leverage his expertise in nursing and healthcare management.

Frankie holds multiple degrees, including an MBA in strategic healthcare management, a Master’s in Nursing, and is pursuing a PhD at Seton Hall University. He holds seven specialty certifications and is a Fellow of the American College of Healthcare Executives. Active in professional organizations, Frankie serves on several boards, including advisory board member for Hofstra University's School of Nursing and Physician Assistant Studies. Recently selected for promotion to Navy Reserve Lieutenant Commander, Frankie continues his commitment to advancing nursing and fostering inclusive leadership.

Michael J. Gatto is a seasoned healthcare leader with over 30 years of experience driving results through effective leadership, strategic alignment, and program integration. His career centers on healthcare transformation, particularly within integrated delivery systems in safety-net and nonprofit health systems across New York.

Currently, Michael is President and Managing Director of Health Matrix Strategies, focusing on health services transformation, transitions of care, and population health management. His past senior leadership roles include Vice President and Chief DSRIP Officer at Nassau University Medical Center, Associate Executive Director for Ambulatory Care at Harlem Hospital Center, Vice President of Ambulatory Care at Bronx Lebanon, and Senior Administrator for Primary Care at Montefiore Medical Center.

Michael is a certified NYS Critical Care Technician and an active member of the American College of Healthcare Executives (ACHE) and the Medical Group Management Association (MGMA). He participates in ACHE’s mentorship program and has received the ACHE Leadership and Education Award.

An educator and mentor, Michael is on the faculty at Long Island University’s School of Health Management and Human Services and serves as a faculty advisor for the Future Health Leaders program. He holds a Master of Public Administration in Health Administration and a Bachelor’s in Business Management/Economics from Long Island University. Additionally, he earned a Certificate in Business Development and Philanthropy and an Executive Certificate in Ambulatory Care Strategic and Financial Planning from Columbia University.

Alyeah E. Ramjit, MS, MHA, serves as System Vice President for the Department of Medicine at One Brooklyn Health, overseeing fiscal, human resources, and strategic operations across 10 divisions in a three-hospital system. Previously, she was Associate Director and Chief of Staff to the Chief Transformation Officer at Mount Sinai Health System, supporting cultural transformation initiatives, patient experience, process improvement, and operational strategies. At Northwell Health, she managed the Mobile Integrated Healthcare/Community Paramedicine Program, focusing on advanced illness care management. She also contributed to integrated care delivery as a Project Manager with the Suffolk Care Collaborative at Stony Brook Medicine.

Ms. Ramjit is deeply involved in academia and professional organizations. She serves as Secretary of the Alumni Organization, an Executive in Residence, and a member of advisory boards at Hofstra University, where she received the 2023 Alumni Achievement Award. She is a Clinical Assistant Professor in Stony Brook University’s Master of Health Administration Program.

Her volunteer roles include Past President of Healthcare Leaders of New York and active membership in the American College of Healthcare Executives (ACHE). She has been recognized with ACHE’s Early Career Healthcare Executive Regent’s Award, Chapter Service Award, and a spot on Crain’s New York 2021 Most Notable in Healthcare list. A featured guest on Becker’s Healthcare Podcast, Ms. Ramjit is also an alum of the 2022 Young Executive Leadership Program by the International Hospital Federation.

She holds degrees in Clinical Nutrition and Biology from NYIT, an MHA from Hofstra University, and leadership certificates from Cornell University.