William G. Arnold, CDFM-A, worked with the Department of Defense for 34 years, over 25 of which he spent in financial management. He has held positions as budget officer, director of resource management, director of disbursing, and entitlements director with the Air Force and the Defense Finance and Accounting Service. He is the author of The Appropriations Law Answer Book , The Antideficiency Act Answer Book, The Prompt Payment Act Answer Book, and Performance Budgeting: What Works, What Doesn't.