Mark grew up Mennonite in North Newton, KS where he graduated from Bethel College in 1993 with a BA in Physics. From 1993-1995 he worked in Boulder, CO, directing a start-up Victim Offender Reconciliation Program and working on international issues at the Rocky Mountain Peace Center. He joined CPT in 1997 as a full-time worker and served on CPT's Hebron project for two-and-a-half years and with CPT's Chiapas, Mexico project for nearly a year.