Kim Sonafelt

Kim joined Mainstay Life Services as Chief Executive Officer (CEO) in 2018. Her role expanded to Vice President and CEO when Mainstay became an affiliate of Keystone Human Services in November 2025. Kim provides executive leadership and strategic direction in all aspects of operations – including finance, human resources, information technology, property management, agency communications and fundraising – to ensure Mainstay carries out its mission to the fullest extent. Additionally, she is responsible for the development, management, administration, supervision and evaluation of programs, policies and procedures, and staff.

Kim has worked in human services for more than 35 years and possesses extensive experience in the intellectual and developmental disabilities field. Prior to joining Mainstay, Kim served Merakey – also a leading provider of integrated services to individuals and communities across the country – as their Regional Executive Director of Intellectual and Developmental Disabilities Services.

In 2024, Kim was awarded the Rehabilitation and Community Providers Association (RCPA)’s Outstanding Leadership Award in recognition of her exceptional innovation, community leadership, and unwavering commitment to better the intellectual disability and autism system as a whole. She also received the Leadership Award from Top Workplaces for medium sized Pittsburgh organizations in 2020.

In addition to her professional achievements, Kim is a proud member of the Mental Health America of Southwest PA Board of Directors, The Provider Alliance Board of Directors, Westmoreland County BH/ID Advisory Committee, Conference of Allegheny Providers Executive Board, Saint Vincent DePaul Society and 100 Women Who Care Pittsburgh.

Kim holds a Bachelor of Arts degree in psychology and Master of Science degree in psychology from California University of Pennsylvania. Additionally, Kim is a Licensed Professional Counselor and Certified Alcohol and Drug Counselor within the state of Pennsylvania.