While in university George Verwer and some of his friends became burdened for the spiritual needs of Mexico. Summer vacations were spent distributing Spanish gospels of John. In his hometown of New York city George also shared the gospel in the streets and door-to-door and saw many give their lives to God. George eventually went to Moody Bible Institute where he met his wife Drena and they along with some friends went to Spain in 1960. All kinds of evangelistic work was started there mainly underground because of the Franco dictatorship during that time. George made an effort to bring bibles into Russia during this period but was expelled when he was discovered and accused of spying. This led George to spend time in prayer seeking God’s will as to how to spread the gospel world-wide. He dropped the name of his ministry from Spread the Light to Operation Mobilisation with the purpose of mobilising Christian mission training and action and service around the world. For the past 40 years, George has had a pioneering effect on world missions around the world, notably among short-term missions, mission ships and distribution of Christian literature. Today, over 4,000 people are involved in the work of OM in over 80 countries. George handed the international leadership of OM to Peter Maiden, but he and his wife continue to travel to challenge and encourage the church around the world into evangelism and world missions.
Take a few minutes and listen to this very inspiring interview with George Verwer who was the 2009 recipient of the Lifetime of Service Award presented by The Mission Exchange. 
http://www.themissionexchange.org/VerwerInterview/