On-Belay Missions started when Mark traveled to Africa with TIVA Water, world water project, working to supply safe drinking water in the city slums and remote villages of Uganda. Mark learned of a medical clinic named Wentz and went there to introduce himself. Against all odds, he met Dr. Martin Nkundeki which led to an introduction to Dr. Tony Mutanda, an orthopedic surgeon at Mulago Referral Hospital. Three days later Mark was invited into surgery at Mulago. The rest is history and Mark, Martin, and Tony remain good friends.