Space Engine Systems Inc. (SES) is a Canadian aerospace company led by Pradeep Dass and is located in Edmonton, Alberta, Canada. The main focus of the company is the development of a light multi-fuel propulsion system (DASS Engine) to power a reusable single-stage-to-orbit (SSTO) and hypersonic cruise vehicle. Pumps, compressors, gear boxes, and other related technologies being developed are integrated into SES's major R&D projects.