 In 2002 McCollum became the executive director of the National Correctional Chaplaincy Directors Association, and since 2004 also serves as the chaplaincy liaison for the American Academy of Religion.He has served as the National Prison Chaplaincy Affairs Coordinator for the Lady Liberty League since 2001, and has served as the International Interfaith Ambassador for Circle Sanctuary since 2010.From 2005–2013 McCollum served as director of chaplaincy for Cherry Hill Seminary.