 In this role, Wynne was the principal staff assistant and adviser to the Secretary and Deputy Secretary of Defense for all matters relating to the Department of Defense Acquisition System, research and development, advanced technology, developmental test and evaluation, production, logistics, installation management, military construction, procurement, environmental security, and nuclear, chemical and biological matters.As Secretary of the Air Force he was responsible for the affairs of the Department of the Air Force, including the organizing, training, equipping and providing for the welfare of its nearly 370,000 men and women on active duty, 180,000 members of the Air National Guard and the Air Force Reserve, 160,000 civilians, and their families.Wynne is a prominent proponent of renewable energy, and supported the Air Force's continued leadership in clean energy procurement.