About Us


Our Clients


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Leaders in technological solutions

Founded in 1995, Aegis provides custom engineering and technology development services to a broad array of clients, including Fortune 50 companies, the U.S. Government, inventors, and entrepreneurs.

Aegis has a proven history of success in technological and product development. Our senior-level engineers, program managers, and consultants supply tailor-made solutions that are consistently at the forefront of technological innovation.

Leadership Team

Mark Tiernan

 Mark Tiernan – Founder and Chairman
A graduate of the OPM Program at Harvard Business School, Mark is an entrepreneur and businessman with over 25 years in Corporate Finance, Business Development and bringing new technologies to market. He earned his JD from USC School of Law, and holds a BS in Political Science from the University of Santa Clara. Mark retired from the Naval Reserves as a Captain and is a service-disabled veteran.

Demetrios Geokezas – Chief Operating Officer
With more than twenty years of engineering and operations management behind him, Demetrios brings a wealth of experience to the Aegis team, including port security, security management, systems integration, and real estate management and development. A former US Navy Officer and US Naval Reserve Officer, Demetrios received his BS in Systems Engineering from the Annapolis-based US Naval Academy. His is also a PMI-Certified PMP.


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