CHC - Key Persons


Abisai Garcia

Job Titles:
  • Post Doc II

Anika McPherson

Job Titles:
  • Administrative Services Coordinator

Cecilia Hackerson

Job Titles:
  • APRN Resident

Chelsea McIntosh

Job Titles:
  • Training Director, Postdoctoral Residency Program

Danielle Casazza

Job Titles:
  • APRN Resident

Dr. Daren Anderson

Job Titles:
  • Chief Quality Officer

Dr. Ho-Choong Chang

Job Titles:
  • Chief of Pediatrics of Community Health Center, Inc
Dr. Ho-Choong Chang is the Chief of Pediatrics of Community Health Center, Inc., the state's largest Federally Qualified Health center providing care to over 145,000 medically underserved patients, of which approximately one third are children. In this role, Dr. Chang oversees the delivery of high quality, evidence-based health care to our pediatric population. With an emphasis on integrated, team-based care, Dr. Chang collaborates closely with the Chief Medical Officer and the chiefs of Behavioral Health, Dentistry, and Nursing to coordinate multi-disciplinary pediatric focused care. Dr. Chang also serves as the On Site Medical Director of Connecticut Pediatrics @ CHC in Hartford as well as a clinical preceptor in our pediatric APRN residency program. Dr. Chang earned his undergraduate degree in psychobiology at Yale College. Prior to entering medical school, Dr. Chang served in the first Teach For America corps and taught science to eight graders in Brooklyn, NY, where he was awarded the school's Teacher of the Year Award in his first year. He received his medical degree from The Johns Hopkins University School of Medicine, and completed his pediatrics residency at the University of Washington, Seattle Children's Hospital. With over two decades of experience, Dr. Chang has cared for children in a number of roles including pediatric hospitalist, urgent care physician, and primary care provider. He was voted Philadelphia Magazine's Top Doctors in Pediatrics in 2018 and 2019. He was also voted Inside New Jersey Magazine's, Top Doctors for Children's Health in 2015 to 2018.

Dr. Nicole Seagriff

Job Titles:
  • Vice President of the Community Health Center Inc.'S Western
Dr. Nicole Seagriff is Vice President of the Community Health Center Inc.'s Western Region, which includes mobile, school based and fixes sites in Stamford, Norwalk, Danbury, Meriden, Bristol and Waterbury. She attended Boston College and graduated with a Bachelor of Science in Nursing in 2007. Upon graduation, she began work as a Registered Nurse in the Medical Intensive Care Unit at Yale New Haven Hospital while completing her Master of Science in Nursing degree at Yale University in 2011 to become a Family Nurse Practitioner. In 2016, she graduated with her Doctor of Nursing Practice degree from Duke University with a focus on genetic testing for breast cancer mutations in underserved populations. While at Yale, she recognized the need for access to primary care services for underserved patients and chose to complete an additional year of training through the nation's first nurse practitioner residency program at the Community Health Center, Inc. (CHCI) based in Middletown, CT. After completion of the NP residency program, she worked as a primary care provider at CHCI for nearly 12 years where she also served as the On-Site Medical Director of the Norwalk and Stamford locations. In addition to this, and with an ever present appreciation for post graduate training, she was Clinical Program Director of the National Nurse Practitioner Residency Program from 2018-2023. In addition to work, she is President of The Pink Agenda, a 501(c)(3) dedicated to raising money and awareness among young professionals for breast cancer research and care. Since its inception less than a decade ago, The Pink Agenda has raised nearly $8 million for life saving research. She is also a former Alumni Board member for her high school alma mater, Sacred Heart Greenwich, where she was the graduation commencement speaker in 2020. In 2022, she was named the Yale School of Nursing Decade Award winner.

Dr. Veena Channamsetty

Job Titles:
  • Chief Medical Officer
  • Chief Medical Officer of Community Health Center, Inc
Dr. Veena Channamsetty is the Chief Medical Officer of Community Health Center, Inc. In this role, she is responsible for the clinical leadership of a large staff of medical providers and caregivers for Connecticut's largest Federally Qualified Health Center. She is responsible for the delivery of evidence-based medical standards, the medical staff recruitment and retention, and provider affairs. Dr. Channamsetty oversees the clinical and non-clinical training, orientation, and onboarding for all new CHC medical providers. With the vision of a stable and solid medical staff, Dr. Channamsetty coordinates clinical care with provider professional interests, promoting provider well-being and work-life balance, overseeing clinical and non-clinical affairs of Physicians, APRNs, and Physician Assistants. Dr. Channamsetty is the President of the Medical Staff and the Chair of the Medical Quality Improvement Committee. She is a clinical preceptor for the APRN residency. Dr. Channamsetty works closely with the chiefs of Behavior Health, Dentistry, and Nursing to promote interprofessional and team based care. She is responsible for ensuring Joint Commission and Patient Centered Medical Home compliance throughout CHC.

Gary Reid

Job Titles:
  • Board Members

Gary Wallace

Job Titles:
  • Director of Community Engagement and Relations at Community Health Center, Inc
Gary Wallace is Director of Community Engagement and Relations at Community Health Center, Inc. In this role, he is responsible for leading CHC's statewide strategic plan for building healthier communities and addressing health equity through strong and responsive local, regional and statewide partnerships. Gary was previously an operations specialist in the US Navy, and joined the City of Middletown Police Department in 1994, rising through several promotions to the rank of Captain. Gary has deep roots in the community. His civic involvement extends to many state and national organizations, including service on the boards of directors of the Community Foundation of Middlesex County, Middlesex Health, the North End Action Team, Gilead Community Services, and the National Organization of Black Law Enforcement Executives. He has served on advisory committees at CHC, Wesleyan, and Middlesex Community College. He mentors youth through the Middlesex Chamber, is active in the Middletown PBA Pipes and Drums, and is a member of American Legion Post 75. Gary has been recognized for outstanding community service by numerous organizations, including the Mayor's office, Middletown Public Schools, the CT Coalition Against Domestic Violence, CT Sexual Assault Crisis Services, and 100 Men of Color.

Jacqueline Ly

Job Titles:
  • APRN Resident

John Monroe Jr.

Job Titles:
  • Duquesne University

Kathleen (Kasey) Harding

Job Titles:
  • Director, Center for Key Populations
Ms. Harding began her career at CHC as the Director of the Ryan White Program. Since then, she has taken administrative and programmatic responsibility for Healthcare for the Homeless (WYA), Hepatitis C, and TEACH-BMT Programs. She was responsible for the development & implementation of CHC's HIV prevention and PrEP programs, providing health care services for vulnerable populations.

Lesley Valbrun

Job Titles:
  • Chiropractor

Leslie Gianelli

Job Titles:
  • Media Contact
  • Vice President, Communications

Lucy Ehrenfeld

Job Titles:
  • Nurse Practitioner

Margaret Flinter

Job Titles:
  • Clinical Leader
  • Senior Vice President and Clinical Director of the Community Health Center, Inc
Margaret Flinter is Senior Vice President and Clinical Director of the Community Health Center, Inc. and is a family nurse practitioner by profession. She earned her Bachelor's Degree in Nursing from the University of Connecticut, her Master's Degree from Yale University, and her doctoral degree at the University of Connecticut. She was the recipient of a Robert Wood Johnson Executive Nurse Fellowship from 2002-2005. In 2021, she was honored with a Yale-Jefferson Award for her steadfast dedication to providing healthcare services for those in need.

Mark Masselli - CEO, Founder, President

Job Titles:
  • CEO
  • Founder
  • President
  • President, CEO, and Founder of Community Health Center, Inc
Mark Masselli is president, CEO, and founder of Community Health Center, Inc., Connecticut's largest provider of medical, dental, and behavioral healthcare for the underserved. A Middletown, Conn. native, Masselli founded CHC in 1972 with a group of community activists. CHC currently provides team-based primary care services to more than 150,000 patients at 200 sites across Connecticut and is an innovator in the delivery of primary care to special populations. At the height of the COVID-19 pandemic, CHC was called upon by Connecticut's executive branch to build and operate the state's largest drive-through mass vaccination sites. Masselli led this historic effort, during which CHC administered more than 500,000 vaccines. In addition, CHC organized hundreds of mobile vaccination clinics, bringing vaccines directly into the most vulnerable communities. Masselli serves as board chair of the National Institute for Medical Assistant Advancement and of the national e-Consult provider ConferMED, is the Chair-Elect of the Board of Directors of the national School-Based Health Alliance, and is a member of the Goodspeed Opera House Board of Trustees. In 2022, he was appointed to the State of Connecticut's Child and Adolescent Psychiatry Working Group. He was awarded an honorary Doctorate of Humane Letters by Wesleyan University in 2009 for his work in the healthcare field.

Marwan Haddad

Job Titles:
  • Medical Director of the Center for Key Populations
  • Medical Director, Center for Key Populations
Marwan Haddad is the Medical Director of the Center for Key Populations. He joined Community Health Center, Inc. in July 2006. He received his Bachelor of Arts degree from Harvard College and his medical degree from McGill University. He completed his family medicine residency at University of Toronto and obtained his Masters in Public Health from Johns Hopkins University. He is board certified in Family Medicine. He is certified by the American Academy of HIV Medicine as an HIV specialist. He was also the recipient of the 2011 Primary Care Leadership Award presented by the Connecticut Center for Primary Care. Dr. Haddad is an Assistant Clinical Professor of Family Medicine at Quinnipiac University. Since January 2012, Dr. Haddad has led the CHC Project ECHO HIV, Hepatitis C, and Buprenorphine programs which expand the integration of these programs not only within CHC but nationwide. This model of care utilizes didactic and case-based learning via video conferences with medical providers, offering ongoing support, consultation and guidance to aid in delivering care to the HIV, Hepatitis C, and opioid using populations. In 2021, Dr. Haddad was named Chair of the HIV Medicine Association. Moreover, Dr. Haddad has taught and lectured at state and national conferences on HIV, Hepatitis C, medication assisted treatment and substance use management, and integrated care. He has published research on the integration of medication assisted treatment such as buprenorphine in community health centers examining both substance use as well as primary care outcomes.

Matthew Griswold

Job Titles:
  • Director of Facilities
  • Facilities Director

Matthew Huddleston

Job Titles:
  • Bate College MD, University of California San Francisco Residency, University of Connecticut Health Center

Megan Culp

Job Titles:
  • Post Doc II

Mette Smith

Job Titles:
  • Vice President of Practice Administration at Community Health Center
Mette Smith is the Vice President of Practice Administration at Community Health Center. In this role, she is responsible for all aspects of practice operations in support of the strategic mission, including excellence in service delivery, patient experience and access. Mette leads cross-functional teams to improve practice performance across all of CHC's health center locations. Mette has years of experience in healthcare system operations, process improvement, project management, training, employer services, quality and acquisitions. Prior to joining CHC, Mette was Director of Process Improvement and Operations at PhysicianOne Urgent Care, where she was responsible for the integration and management of PhysicianOne's partnerships with Yale New Haven Health System and Tufts Medical Center. She also led the acquisition of 7 new locations. Prior to joining PhysicianOne, Mette was the Process Improvement Coach at ProHealth Physicians where she created and delivered workflows that resulted in high quality, efficient, patient and family-centered care. She is guided by a strong philosophy of achieving positive outcomes through critical thinking, team collaboration and employee development. Mette earned her Master of Management, Strategy and Leadership from Michigan State University and graduated from Albertus Magnus College summa cum laude with a degree in Business Management. She is a Certified Lean Six Sigma Black Belt.

Michael Cubria

Job Titles:
  • Site Behavioral Health Director

Michael Posocco

Job Titles:
  • Director of Facilities

Michelle Cardona

Job Titles:
  • College of the Holy Cross, Graduate Work at Johns Hopkins Bloomberg School of Public Health, MD, Jefferson Medical College

Nat Holmes

Job Titles:
  • Program Manager
  • Middletown FWC Program Coordinator

Nindi Tiemo

Job Titles:
  • APRN Resident

R. Timothy Kearney

Job Titles:
  • Chief Behavioral Health Officer
Dr. Kearney earned his BA with a combined major in Psychology and Spanish Literature at Yale University and pursued graduate work at Fuller Theological Seminary where he earned his MA (Theology) from the Graduate School of Theology and his Ph.D. (Clinical Psychology) from the Graduate School of Psychology. He has also completed the post graduate Primary Care Behavioral Health training program at the University of Massachusetts Medical School, Worcester. He is a licensed psychologist in Connecticut. He joined the Community Health Center behavioral health staff in 1998. He is the author of Caring for Sexually Abused Children: A Handbook for Families and Churches (Intervarsity Press, 2001). In addition to administrative and clinical leadership of the Behavioral Health programs at CHC, Dr. Kearney supervises and trains postdoctoral psychology residents, co-leads psychotherapy groups with students and younger staff to train them in the provision of child group therapy, and provides direct client care with the clinical focus of providing care to children and adolescents and their families, especially those impacted by medical illness, trauma, and abuse.

Rachel Romero

Job Titles:
  • APRN Resident

Sheela Tummala

Job Titles:
  • Chief Dental Officer

Yvette Highsmith-Francis

Job Titles:
  • Vice President of Community Health Center, Inc
  • Vice President, Eastern Region
Yvette is the Vice President of Community Health Center, Inc.'s Eastern Region. Yvette has worked with CHCI for 28 years in a variety of capacities. In her current role, she oversees eight of the fourteen CHCI locations in New Britain, Enfield, Hartford, Middletown, Clinton, Old Saybrook, New London and Groton as well as the School Based Health services across the state. Yvette has been instrumental in the openings of the CHCI locations in Enfield, Waterbury and Bristol. In the early phases of her career, Yvette worked directly with countless individuals and families providing support to address the social determinants of health and to improve the quality of life for those she worked with. Committed to the elimination of racial/ethnic health care disparities; Yvette works diligently to ensure that the community's most vulnerable residents continue to have access to quality medical, dental, mental health and school-based services and that those services are delivered with dignity and respect. Yvette is actively engaged in the communities she serves and is committed to public and civic service in her personal time as well. Yvette currently oversees Community Advisory committees and is the co-chair of the PCMH+ Oversight Committee. Yvette is a graduate of the UCLA/Johnson & Johnson Health Care Executive program as well as the Connecticut Health Foundation's 2009 Health Leadership Fellows Program. Yvette was a Martin Luther King Scholar at Long Island University and received her Master's Degree in Management from Cambridge College. She has received recognition on the local, state and national level for her work with individuals living with HIV and AIDS. She has received numerous awards and recognition for her work within CHCI and in the community at large.