She started overseas medical work in 1991 when she volunteered to help in the Kurdish refugee camps. She has since worked in Kurdistan, Afghanistan, Chad, South Sudan, North Sudan, Tanzania and the Philippines. Cathy and her husband currently serve in the Republic of South Sudan bringing health care and the hope of the Gospel in the midst of the largest refugee camp in South Sudan. Cathy is the SIM Health Program Manager in Doro where she manages a wide variety of health programs and works clinically.