David DiGuglielmo, 76, of Schwenksville, retired superintendent at the State Correctional Institution Graterford, behavioral psychologist, longtime prisoner advocate, and veteran, died Wednesday, Oct. 30, of transverse myelitis. He made it a priority to engage with his staff and the prison population, and he encouraged those who were incarcerated to share their life experiences with at-risk young people.

Mr. DiGuglielmo spent more than 36 years, from 1974 to 2010, at Graterford Prison in Montgomery County as a psychologist, program manager, deputy superintendent, and superintendent. He was superintendent for seven years, from 2003 to his retirement in 2010, and he managed thousands of incarcerated men in one of the state’s two largest prisons.