Our Management Team

Philip Brennan (CEO) has 20 years of business development, marketing and sales management experience with Fortune 100 companies and entrepreneurial startups.  He was the youngest recipient of Georgetown University’s Graduate Fellowship for the Masters in Business Administration, entering the program at 22 years old.  He has led and managed a variety of businesses, ranging from $200 million + portfolios to emerging start-ups.  Over his career Phil has conceived, developed, and launched over 100 new products in the plastics, nutraceuticals, food and packaged goods industries, and has previously raised angel financing and prepared companies for the next stage of venture funding. He has held senior and executive management positions in operations, finance, manufacturing, sales and general management. 

Timothy Held (VP Engineering) joined rexorce in October, 2008 as Vice President of Engineering, where he is responsible for technology maturation and transition to product.  Dr. Held (Ph.D., Princeton Univ.) was most recently the Manager of Commercial Engine Combustor Aero Design for GE Aviation, where he led the design effort for the GEnx TAPS low emissions combustor technology and product introduction. He previously managed the Industrial Aeroderivatives Combustor Aero Design group at GE, where he led the design of both conventional and Dry Low Emissions (DLE) combustors for the LMS100, which at 100+ MW, is the largest aeroderivative gas turbine in the world. He was also responsible for the design of dual-fuel DLE combustor development for the LM2500 and LM6000 engines, and for the design of a 15ppm NOX combustion system for the LM6000, which was originally rated at 25ppm.  He also served as the technical leader for alternate fuels research and evaluation at GE Aviation. In that function, he led the engine evaluation team for the first flight demonstration of a biofuel blend in a Virgin Atlantic 747. He presently holds 12 issued patents, with 12 additional patents in process.

Mark Terzola (VP Corporate Affairs and General Counsel) is responsible for day to day operations, human resources, government relations and serves as rexorce’s primary legal counsel.  As a degreed engineer (Civil/Environmental from the University of Notre Dame), and the former leader of the IP department at a large, national, full service law firm, Mark combines his technical background with years of experience working with dozens of companies ranging in size from Fortune 100 to pre-revenue start ups and in the areas of general corporate and IP counseling, IP litigation, mergers/acquisitions and technology licensing.  In addition, as a member of rexorce’s management team, Mark serves to ensure the alignment of the company’s day to day operations with its long term strategic goals, the delivery by the rexorce team against individual and company goals and the development of channel, technology and supply chain partners.