Southeastern Asia Union Mission of Seventh-day Adventists

Our History

The Southeastern Asia Union Mission (SEUM) is a significant part of the Southern Asia-Pacific Division (SSD), overseeing several territories across Southeast Asia. Originally known as the Southeast Asia Union Mission (SAUM), it was organized in 1917 and reorganized in 1929, with its headquarters located in Singapore. Over the years, the mission territory grew and evolved, eventually covering seven countries: Brunei Darussalam, Cambodia, Laos, Malaysia, Singapore, Thailand, and Vietnam. 

On November 5, 2019, the Southern Asia-Pacific Division voted to restructure the SAUM into two new unions and one conference, a process completed by December 2021. This restructuring aimed to enhance the focus on mission work in diverse regions, particularly in Cambodia, Laos, and Vietnam. 

The reorganization led to the formation of: 

Southeastern Asia Union Mission (SEUM), with headquarters in Muak Lek, Thailand, covering Cambodia, Laos, Thailand, and Vietnam. 

Malaysia Union Mission (MAUM), with headquarters in Kuala Lumpur, Malaysia, covering Peninsular Malaysia, Sabah, Sarawak, and Brunei. 

Singapore Adventist Conference (SAC), which remains attached to the Southern Asia-Pacific Division and headquartered in Singapore. 

The SEUM now includes one conference, six missions, and one region, and oversees three Adventist hospitals and eight elementary/secondary schools across its territory. 

As of June 30, 2020, SEUM comprises 391 churches with a membership of 97,585, serving a population of over 224 million people. 

Through strategic planning and dedicated leadership, SEUM continues to grow and adapt, focusing on nurturing the Adventist work in its diverse regions. 

Contact Us


(+66) 036 298 470

Office Hours

Monday to Thursday 8:00 A.M. – 5:30 P.M.

Friday: 8:00 A.M. – 12:30 P.M.