Coordinate monthly invoicing with Accounting, validate supporting time and cost documentation, review draft invoices, and obtain customer approval for submission.• Maintain complete, organized, and auditable project documentation, including key decisions, customer requests, revisions, approvals, deliverables, and historical cost records.• Location: Rapid City, South Dakota Position Type: Full-time Compensation: Commensurate with experienceThis is an exciting opportunity to join a company that works with Federal, State, Tribal, and Local Government agencies as well as private clients throughout the United States and internationally.