 In 1986, he founded International Cooperating Ministries (ICM), a Christian nonprofit organization whose mission is to build a church within walking distance of everyone in the world and, as of 2019, had 8,543 church projects built or under construction.ICM built their first church for $5,000 in India and Rosser dedicated it to his father.He was Chair Emeritus of ICM at the time of his death.