Subud Enterprise Services (S.E.S.) is one of the "wings" of the spiritual organization Subud. It is not an independent entity, but a division controlled by the World Subud Association. Its purpose is to assist Subud members in their entrepreneurial activities.
Subud's founder, Muhammad Subuh Sumohadiwidjojo (called Bapak) encouraged Subud followers to develop "enterprises" (Indonesian: usaha, "efforts"). This was to demonstrate that Subud has practical advantages, and so that more Subud members would have the means to support Subud financially and have a work-life balance that would allow travel on behalf of Subud.
References
Subud Enterprise Services Wikipedia(Text) CC BY-SA