Daniel F. Chalk, 63, a physical therapist who had worked in the Washington area for three decades, died April 29 at his home in Fairfax Station.

He had cancer, said his son, Casey J. Chalk.

From 2005 to 2012, Mr. Chalk worked for the Jackson Clinics as a clinical director at locations including the Lorton and Centreville offices. He had previously practiced with National Spine & Pain Centers.

In the early 1990s, he was director of the physical therapy department at what was then the National Hospital for Orthopaedics and Rehabilitation in Arlington and executive director of the Center for Orthopaedics and Sports Physical Therapy in Sterling.

In the 1980s, he founded and ran Potomac Rehabilitation, a physical therapy office in Woodbridge, and worked as a licensed practical nurse.

Daniel Francis Chalk was born in Detroit. He served in the Army and the Army Reserve in the 1970s, including as a medic in South Korea. He settled in the Washington area after receiving a bachelor’s degree in physical therapy from Virginia Commonwealth University in 1978.

His memberships included the McLean Bible Church, the Burke Racquet & Swim Club and the Izaak Walton League of America, an environmental organization.

Survivors include his wife of 33 years, Christine Fitzpatrick Chalk of Fairfax Station; his son, Casey J. Chalk of Fairfax County; his parents, Joseph Chalk and Irene Kosakowski Chalk of Springfield; three brothers, Joseph “Jody” Chalk and Steven Chalk, both of Springfield, and Michael Chalk of Huntsville, Ala.; a sister, Mary Ann Reynolds of Charlotte; and a granddaughter.

— Emily Langer