The Center was founded by Ralph D. Winter (1924-2009) and his wife Roberta Winter (1930-2001) , who served as Presbyterian missionaries to a Mayan tribal group called the Mam people in Guatemala for 10 years.
Ralph D. Winter (1924-2009) dan istrinya Roberta Winter (1930-2001) melayani sebagai misionaris Presbyterian bagi suku bangsa Maya yang disebut "orang Mam di Guatemala selama 10 tahun.