Through subordinate staff, consultants, contractors, and/or personally, and in collaboration with the Department Manager, provides a wide range of cost estimating functions, including verification (or origination) of independent cost estimates, cost impact analysis, cost analysis, statistical business case analysis, and cost forecasting functions in support of the planning and management of the Capital Construction Program (CCP), Capital Operating and Maintenance Investment Program (COMIP), Dulles Corridor Capital Improvement Program (CIP) and Dulles Corridor Repair and Rehabilitation (R&R) Program. Reviews and reconciles budget estimates, independent cost estimates, construction and design change estimates, and supports the development of cost-benefit analyses including Life Cycle Cost Estimates (LCCE) and Analyses of Alternatives (AoA), to aid management budgetary decisions.