Bob Diepenbrock and his wife Mary met at New Tribes Mission (now Ethnos 360) Bible Institute in Jackson Michigan.  They married in 1993. They are both children of missionaries and were fully intending to be full time missionaries but God had other plans. Soon after the birth of their first child about three decades ago, they found Wylie Bible Church, then Northeast Bible Church, and have been actively involved since.  Married over 30 years, they have two adult children.

Mary loves children and has been the full time Director of Wylie Bible's Children's ministry called  Wylie Kids since 2018. Mary also assists with women's ministries events and fellowships.  Bob, who is a full time software engineer, serves Wylie Bible Church as the chairman of the elder board, and by maintaining the information technology and audio/visual infrastructure of the church. Bob and Mary host a weekly small group at their home.