Steve and Deanne began their missionary service in January 1991 with International Media Ministries in Brussels, Belgium. At IMM they were part of a team producing radio and television programs for Europe, Africa and Asia.

In 1999 they transitioned to university ministry and co-launched Students for Christ Belgium.  SFC is the international equivalent of Chi Alpha, the U.S. Assemblies of God ministry to the secular campus.

SFC Belgium currently has groups in 5 cities with some 150 students involved and hundreds of alumni. Students or alumni are leading all of the local groups and in 2010 national leadership for SFC Belgium was transitioned to a former student as well.

In addition to their continued involvement in leadership development and training for students and alumni throughout Belgium and across Europe, from 2012 through 2016, Steve and Deanne served the Europe Regional Director, assisting with special projects and events.

The Turleys have now answered a call to the Balkans, the most unreached and challenging area of Europe.  This war-torn and fractured region has been hurting for decades.  In July 2018, Steve and Deanne moved to Zagreb, Croatia to be part of a rejoined and focused effort to bring the hope of Christ to the Balkans.