In 1996, he heard about the American Prophet, Gordon B. Hinckley, coming to visit Cambodia and he went to the Cambodiana Hotel to hear him speak. Sang didn’t know what a prophet would look like and was surprised to see a mild-mannered gentlemen in ordinary clothing. However, he felt the powerful spirit of the prophet’s words and sought out missionaries to teach him. He was baptized a member of The Church of Jesus Christ of Latter-day Saints on 21 December 1997, the day after his 19th birthday.

Sang progressed in the Church and, at the age of 22, he was called on a full-time mission to Cambodia and finished his mission January 2001. He learned much during this time and served as a zone leader in both Kampong Cham and Phnom Penh. Sang worked at the mission office as Administrative Assistant to the Mission President from January 2001 until December 2002 when he went to work for the Cambodia Service Center as Materials Management Supervisor. He also attended night classes to earn a degree in Economics.