The Dept. of Energy (DOE) relies on contractors to conduct its mission activities. DOE reimburses these contractors for allowable costs, including the costs of providing pension and other postretirement benefits, such as retiree health care plans. Since the economic downturn, DOE has had to devote significantly more funding toward reimbursing these benefit costs, in part because of a decline in interest rates and asset values that has increased contractor pension contributions. In a challenging budgetary environment, further growth in these costs could put pressure on DOE's mission work. This report examines (1) the level of control DOE has over contractor pension and other postretirement benefit costs under its current business model and (2) the changes DOE has adopted since the national economic downturn to manage those costs and the extent to which those changes have enhanced its approach. Includes recommendations. Tables and figures. This is a print on demand report.