Junior Contract Support Assistant (CSA) / Acquisition Planner
XMSTART · Chantilly, Virginia, United States · Posted Jun 22, 2026
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XMSTART is looking for a Junior Contract Support Assistant / Acquisition Planner to join our team! Candidate shall perform a range of contract administrative and acquisition planning functions leading to compliant and responsive contract awards, modifications, invoicing, and other actions, including day-to-day office management support as follows:
Provide direct support to a Government Contracting Officer (CO) in execution of their duties and responsibilities
Provide contracting assistance to technical personnel involved in development of statement of work or data deliverable requirements
Draft contracts and contract modifications in the Government’s contracting application
Prepare minor contract modifications and associated supporting documentation for actions such as funding, award fee, period of performance extension, and administrative modifications
Enter contractual information into the Government’s contracting application, as required
Monitor and evaluate contractor performance for compliance with contract terms/conditions and ensure timely submission of contract deliverables
Review completed official contract files to determine all contractual actions are satisfied
General office management support, such as logistical support, document generation and review for content and format, filing, files maintenance, photocopying, scheduling meetings/rooms, and calendar management
Organize and make compliant all contract e-folders
Assist with invoice processing
Send daily emails to Government personnel for pending invoices
Organize and track Government certifications and transcripts
Coordinate Award Fee briefings
Develop tracking systems for action items and other areas as necessary
Generate contract reports and Draft closeout documents
Prepare and submit expired contracts into the contract close-out process
Maintain and track schedule of program acquisition activities
Perform administrative support for source selections
Perform acquisition planning actions as directed by Lead Acquisition Planner