Cherokee Nation Technologies, Tulsa, Oklahoma, has been awarded a $39,461,205 firm-fixed-price contract for advisory and assistance services (A&AS) for programmatic, environmental cleanup, project execution and financial support. This contract provides base realignment and closure programs and requires a full range of A&AS and deliverables in the areas of management and professional services; studies, analyses, and evaluations; and engineering and specialized technical expertise. Work will be performed at several locations in the U.S. and is expected to be complete by April 6, 2023. This award is the result of a competitive acquisition and three offers were received. Fiscal 2019 operations and maintenance funds in the amount of $9,525,678 are being obligated at the time of award. Air Force Installation Contracting Agency, Joint Base San Antonio, Texas, is the contracting activity (FA8903-19-F-0001).