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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

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