John Clark is vice president of engineering and technology, aeronautics, for Lockheed Martin. Among his responsibilities is leading the 8,000-plus engineers within Lockheed's aeronautics business area. Previously, he was the vice president of intelligence, surveillance, and reconnaissance and unmanned aircraft systems for Lockheed's Skunk Works, where he oversaw a portfolio with US $800 million in annual sales and a team of about 1,500 employees. He lives with his wife, two children and a small herd of miniature donkeys outside of Fort Worth, Texas.