Our Senior Leadership Team is responsible for the day to day guidance of Public Health Solutions (PHS). They are also highly committed to inspire PHS’ passionate and talented staff to learn more, do more, and become more.

Lisa David

President and CEO

Lisa David is the President and CEO of PHS. She leads the organization to support vulnerable families in achieving optimal health and building pathways to reach their potential. Under Lisa’s guidance, PHS improves health outcomes and helps underserved families thrive by providing services within communities that need them most, serving as a critical link in public-private partnerships with government agencies to support over 200 community-based organizations across the city, and conducting independent research to evaluate program impact.

Lisa has over 30 years of experience in the public health and healthcare sectors. Prior to joining PHS, she held positions as the Interim CEO of Medicines360, the EVP and COO of Planned Parenthood Federation of America, and the Vice Chair for Administration of the Department of Obstetrics and Gynecology at the Columbia School of Physicians and Surgeons. Lisa currently serves on the Health and Mental Health Advisory Committee for the New York City Department of Health and Mental Hygiene, the Policy Committee of the United Hospital Fund Policy, and on two committees of the Human Services Council: the Value Based Payment Commission and the Priority and Strategy Council. She also serves on the board of directors of Medicines360, and the board of trustees of the Women’s Health Activist Movement Global (WHAMglobal).

Christine Nollen

Chief Strategy Officer and Vice President of CAMS

Christine Nollen, MPA, MPH, oversees the strategic operations as well as the Contracting and Management Services (CAMS) Department. She joined PHS in 2016. Most recently Christine was the Administrative Director of the Department of Medicine for Mt. Sinai Beth Israel, where her role was to restructure and revitalize the department subsequent to a merger. A graduate of Georgetown and Columbia Universities, she has spent her 20-year public health career working in the nonprofit and hospital sectors, focused on access to care and quality of care for marginalized populations. She served in a variety of operational leadership roles for the largest HIV Center in New York State, at St. Luke’s Roosevelt Hospital, now part of the Institute for Advanced Medicine at Mt. Sinai. She also worked at Planned Parenthood Federation of America on a national STI awareness raising campaign, and has worked internationally consulting on the development of programs in Kenya and Eastern Europe.

Marla Tepper

Vice President of Legal Affairs and General Counsel

Marla Tepper joined PHS in 2016 as Vice President of Legal Affairs and General Counsel to oversee PHS’ compliance with federal, state, and local laws and regulations, as well as handling litigation. She provides counsel to the Executive Director, Board, and staff, addresses nonprofit governance issues and legal questions related to contracting and commercial leases, and engages in and supports policy work.  Marla’s legal and public service career spans more than 25 years. Prior to her current role, she served as General Counsel and Deputy Commissioner of the New York City Department of Consumer Affairs, the largest municipal consumer protection agency in the country. She also served as an Assistant U.S. Attorney for Civil Rights in the Eastern District New York State Attorney’s office, and as a NYS Assistant Attorney General in the Consumer Fraud, Civil Rights, and Litigation bureaus.

Zachariah “Zach” Hennessey

Vice President of Neighborhood Health

Zach Hennessey joined PHS in 2017 as Vice President of Neighborhood Health to oversee PHS’ direct service program areas—including program development, delivery and evaluation, budget setting, knowledge management, and all internal and external relationship management. Zach comes to PHS with over a decade of experience in developing, executing, and evaluating health and human services programs in collaboration with local communities. Prior to Public Health Solutions, he served as Assistant Vice President for Community and Population Health at Wyckoff Heights Medical Center and co-directed the Special Projects Division of the Spencer Cox Center for Health at St. Luke’s-Roosevelt Hospital Center, New York’s largest Designated AIDS Center. Zach was also the Director of Development and Evaluation at ECQ Group, a small non-profit public health consulting firm, where he developed and evaluated health and human services programs for a broad range of nonprofits.

Lisa Jakobsberg

Vice President of Development and Marketing

Lisa Jakobsberg joined PHS in 2016. She serves as chief strategist in building the direction for fundraising, public relations, marketing, and brand positioning for PHS. She oversees all fundraising, including individual giving and foundation grants, to expand new and existing programs that focus resources to where they are most needed in managing chronic and merging public health issues. Lisa previously served as the Executive Vice President of Development and Corporate Relations at the National MS Society and led re-branding, business partnerships, and events at the Food Bank For New York City. Lisa worked in public relations prior to her career in nonprofit marketing and fundraising. She led multi-year communication campaigns that led to public policy shifts among national health organizations, including the American Heart Association and American Academy of Pediatrics.

Joseph Trapani

Chief Financial Officer

Joseph Trapani, CPA, CGMA, has been PHS’ Chief Financial Officer since 2002. As head of the Fiscal Department, he oversees organization’s books, financial records banking and payroll, establishes fiscal controls over all aspects of PHS’ business, and ensures compliance and reporting for the 90-100 grants and programs that comprise PHS’ work. Prior to joining PHS, Joseph served as the Chief of the Bureau of Management and Accounting Systems at the City of New York Office of the Comptroller.


Emily Morgan

Chief of Staff

Emily is Chief of Staff to the President and CEO of Public Health Solutions. She joined Public Health Solutions in 2016. In this capacity, she oversees the daily activities of the Office of the CEO and helps ensure alignment of key strategic goals and projects.  She previously served in similar capacities at Planned Parenthood Federation of America as Managing Director in both the Office of the President and the Office of the Chief Operating Officer, in the sports world for the founders of World TeamTennis, and for a number of senior executives at JPMorgan Chase. In between these roles, Emily was acting Executive Director of Dixon Place, an experimental Off-Off-Broadway theater.