 The firm began operations in 2005 as STET Homeland Security, a business unit of its parent company ST Education and Training (STET) whose core businesses include defence, maritime and education.It was housed at HarbourFront Centre until 2007 when it moved to the Holiday Inn Atrium on Outram Road.On 8 March 2009, it was incorporated as a subsidiary of STET and renamed STET Homeland Security Services Pte.