Thien is originally born in Saigon, Vietnam and immigrated to the United States of America at the age of one. He grew up in a half Buddhist and half Catholic family. Difficult childhood experiences led him to find God as a teenager. After experiencing a radical conversion, he entered into ministry. A graduate of Bible College and of Talbot Theological Seminary, Biola University (MDiv) and will be earning a Doctorate in Ministry in May, 2017.

Thien has been working in the area of church planting in various roles for more than a decade.  He has personally planted three churches in Southern California and worked as assessor, coach, consultant and strategist for several church planting organization including the Acts 29 Network, Southern Baptist Convention, Evangelical Free Churches of America, and the LaunchStrong / Multiply Network.

He is a sought after speaker and has spoken and lectured at conferences and universities for The Gospel Coalition, Biola University, Golden Gate Theological Seminary, Acts 29 Network, The Reformed Church of America, and Union University of California.  Currently he is the Lead Pastor of Citylights Church in Little Saigon, Orange County, which is among the first church plants targeting one of the least-reached people groups in North America.

Thien and his wife Kerry have been married for 17 years and have three children and live in Fountain Valley, California. Both Kerry and Thien are huge Lakers fans, and spend many nights yelling at the television together because of how bad the Lakers are doing.

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