David Tilles, President, Chief Executive Officer and Cofounder of ASELL, has over 35 years of experience leading both small and large organizations in the development, integration, and sustainment of complex systems in industries ranging from industrial automation to medical devices. Prior to founding ASELL, Mr. Tilles spent over 30 years at Northrop Grumman, rising to the level of Vice President of CBRNE Defense Systems. In that role, he led an organization that grew to one of the largest CBRNE defense businesses in the industry, with a broad range of technologies and US Government customers. After retiring from Northrop Grumman and prior to founding ASELL, he spent several years as an independent consultant helping small businesses win and execute government programs. Mr. Tilles has a BES in Materials Science and an MS in Technical Management, both from the Johns Hopkins University, and has taken management courses at the University of Chicago and Harvard Business School.