Mission Support Administrative Specialist

Amentum
Chantilly, Loudoun County, VA

: R0104911 On Site Chantilly, Virginia, United States Full time Amentum is seeking a Mission Support Administrative Specialist located in the Northern Virginia area. Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. This is an in-office position, requiring to be on site 5 days a week. TS/SCI clearance is required. Essential Responsibilities: Performs routine to advanced administrative tasks in support of the daily operations of the department. Manages day to day administrative workflow. Maintains working knowledge of the customer policies and procedures Assists with a variety of scheduled and unscheduled projects specific to assigned department/program. May be required to work with general supervision on projects requiring research and preparation of briefing charts and other presentation materials. Perform all other position related duties as assigned or requested. Some off-site travel may be required. Minimum Requirements: Must maintain a TS/SCI level security clearance. High school diploma Minimum 2 year of administrative experience Working knowledge of general office procedures. Fluency in English, both oral and written communication, with knowledge of business communication, including style and format of letters and reports. Excellent typing skills with high proficiency in Microsoft applications such as Word, Excel, PDF and PowerPoint. Strong organizational skills with the ability to manage multiple tasks in a fast-paced environment. Ability to operate office machinery such as fax and copier machines. Requires experience operating application software including word-processing and spreadsheet programs. Ability to sit for the duration of shift. Must have the ability to stand/walk for extended periods of time. May require repetitive motion during work shift. Ability to lift at least 20 pounds. Ability to drive with a valid driver's license. Preferred: Associates degree Familiarity with the customer policies and procedures Work Environment, Physical Demands, and Mental Demands: This is an in-office position, with no unusual hazards, occasional lifting to 20 pounds, constant sitting while using the computer terminal, constant use of sight abilities while reviewing documents, constant use of speech/hearing abilities for communication, constant mental alertness, must possess planning/organizing skills, and must be able to work under deadlines.

Posted 2026-08-18

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