Demetrius was driven to become an engineer from a young age, designing submarines, bicycles, and airplanes in his spare time. This passion led him to pursue dual degrees in Mechanical and Aerospace Engineering. While in college, Demetrius served as a teaching assistant at the senior design laboratory where he trained seniors in the use of machining equipment and made parts and equipment for faculty. His time spent in a machine shop proved formative in his understanding of how things get built and the importance of integrating design with practicality.

Demetrius was approached by the Navy to join the Nuclear Propulsion Officer Candidate Program due to his strong academic performance. Seeking a change from his academic focus on aerodynamics and mechanical design, Demetrius saw an opportunity to use his knowledge to serve his country and joined the Navy. His first tour was on the USS DeWert serving as the Communications Officer and Assistant Operations Officer, overseeing all computing and communication equipment onboard during an independent counter-drug deployment.

After completing training at Naval Nuclear Propulsion School and Prototype, Demetrius reported to the USS Enterprise as a mechanical division officer for one main space and the two auxiliary machinery spaces. There he oversaw three divisions of sailors and was responsible for the operation and maintenance of equipment ranging from steam turbines to water purification equipment. After two deployments on the USS Enterprise in the Middle East and Asia, Demetrius qualified as Engineer at Naval Reactors before resigning his commission.

Demetrius sought out a new challenge that would allow him to experience a broader scope of engineering, and took a position at MPR Associates. With his experience managing high functioning teams coupled with his technical knowledge of fluid dynamics, he was provided the opportunity to work in wide ranging projects including safety analyses for commercial nuclear plants, regulatory reviews of safety systems, design of medical devices, complex thermal and structural finite element analyses, and project and program management. During this time Demetrius had the opportunity to work with incredible engineers in an environment that rewarded his integrated approach to engineering.

After more than ten years with MPR Associates, Demetrius Siachames left to provide independent engineering consulting services as Sigma Expert Solutions. He currently serves as Vice President of Sparta Biomedical while he continues to pursue his dream since college of growing Sigma Expert Solutions into an engineering company focused on integrating various disciplines to create innovative solutions to the world’s most complex problems.