Leadership Team

Heidi Romans Nelson
Chief Executive Officer


Heidi Nelson joined Duffy Health Center as CEO in 2010. Heidi is responsible for Duffy Health Center operations, quality of care, program development, funding support, advocacy on behalf of persons experiencing homelessness, and representing Duffy at the local, state and national level. For 18 years prior, Heidi was the Executive Director of Heartland Health Outreach, Inc. in Chicago, a wholly-owned subsidiary of Heartland Alliance for Human Needs & Human Rights, providing health care services to the poor and disenfranchised including persons experiencing homelessness, refugees and impoverished persons with HIV disease. From 1987 to 1992, Ms. Nelson was Assistant Vice President at Northwestern Memorial Hospital in Chicago, serving in a number of operations management roles.

Heidi served as President of the National Health Care for the Homeless Council in 1996, and currently is the Administrators Committee Chair. Ms. Nelson received her master's degree in health services administration from the University of Michigan School of Public Health in 1985, and remained in Ann Arbor for two years as the Fellow in Academic Medical Center Administration at the University of Michigan Medical Center. Her bachelor's degree is in Community Health Education from the University of Illinois. She became a Fellow of the American College of Healthcare Executives in 2008.

Heidi is married to Bruce Nelson and they reside in Harwich, MA.

David Burke
Chief Financial Officer

David Burke headshot.jpg

David Burke joined Duffy Health Center as our Chief Financial Officer on August 1, 2016. Most recently, David served as CFO at Cottage Hospital on Nantucket. He worked briefly at Outer Cape Health Services in 2009-2010, and served as the Vice President for Finance of a rehabilitation services company in New York for ten years prior to that. David has a Bachelor of Science in Accounting from Northeastern University and a Masters in Business Administration from Sacred Heart University. David lives in Eastham with his wife and is excited to work at Duffy and help us to achieve our mission. 

Wesley Klein, D.O.
Medical Director


Dr. Wesley Klein became Duffy's Medical Director in December of 2013. His background in family medicine has allowed us to expand our services to include families and adolescents. Dr. Klein's experience includes his residency training in Family Medicine at Ellis Hospital in Schenectady, New York as well as practices in Massachusetts and on Cape Cod. Dr. Klein was an Assistant Professor of Biology at Manchester Community College in Manchester, New Hampshire. Dr. Klein functions as a key member of the Duffy Patent Centered Medical Home Team and runs a daily "Morning Huddle" where his team discusses patients' needs for the day. Dr. Klein is certified by the American Board of Family Medicine and licensed to prescribe Suboxone and Vivitrol.

Learn more about our Medical Care services.

Patricia A. Cawley, LICSW, BCD,
Senior Director of Program Resources


Patricia A. Cawley joined Duffy Health Center in 2012 as Director of Case Management and Integrated Services. A graduate of Boston College Graduate School of Social Work, she has extensive clinical experience working with under serviced populations – primarily people with addictions, mental health disorders and those experiencing homelessness. Pat's administrative expertise includes developing systems of care and restructuring programs as the clients' needs and funding streams change.

Prior to returning to Massachusetts, Patricia was the Clinical Director of Camillus House, a nonprofit agency in Miami, FL that provides a complete system of care for people who are homeless. In 2012, she was honored by being named the Social Worker of the Year for Miami Dade County. At Duffy, Patricia supervises the case management programs and spearheads the continuing efforts to further integrate medical, behavioral health and case management services.

Learn more about our Case Management services.

Elyse DeGroot
Director of Community Relations and Marketing


Elyse DeGroot, a Massachusetts native, has lived in Falmouth and worked on Cape Cod since 1989. Elyse has been the Director of Community Relations and Marketing for Duffy Health Center since 2007, working previously as the Director of Development for Elder Services of Cape Cod and the Islands and as the Director of Senior Services for the town of Barnstable. Elyse has been an active volunteer for her church, the United Way, Falmouth Public Schools, Falmouth Band Parents and has served on the Falmouth Service Center board of directors since 2007. A graduate of Union College, Elyse received an MSW from Boston University and an MBA from Simmons College Graduate School of Management.

Jane de Groot
Senior Director of Program Resources


In 2001 when Duffy staff were working in a 500-square foot clinic at the local emergency shelter, Jane de Groot authored a successful request to the Health Resources and Services Administration (HRSA) for Duffy Health Center to be recognized as a federally qualified community health center with a mission to serve Cape Cod's most vulnerable residents. In 2006, Jane formally joined Duffy as the Director of Program Resources. Her role in program design and grant writing has supported agency growth by leveraging Duffy's successful model of care through multiple federal awards from HRSA, SAMHSA, and HUD, among other funders. She has initiated and nurtured Duffy's involvement in research with academic partners; has championed evidence-based practice training for staff and community partners; and has strengthened Duffy's ability to serve its clients through developing key agency partnerships and special projects.

Jane received her BA in Comparative Literature from Antioch College and MPA in Health Services Administration from NYU Wagner School of Public Service. While in New York, she worked for John Wiley & Sons Medical Division, Memorial Sloan-Kettering Cancer Center, the New York City Dept. of Health, and NYU School of Education and Allied Health, Office of Sponsored Research. After moving to Cape Cod with her family, she assisted many non-profits and developed the Cape's first School Based Health Center.

Learn more about our Community Partnerships.