Senior Office Administrator - Military veterans preferred

ManTech (


  full-time   employee

United States

Secure our Nation, Ignite your Future

Become an integral part of a diverse team that leads the world in the Mission, Cyber, and Intelligence Solutions group. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer oriented Sr. Office Administrator to join our team in Chantilly, VA to provide unparalleled support to our customer and to begin an exciting and rewarding career within ManTech. 

The Sr. Office Administrator will provide on-site administrative support and coordination to a complex contract, project or task(s). The successful candidate will provide on-site administrative support and coordination to a Deputy Director.

Duties include but are not limited to: 

  • Oversees the administrative and clerical functions of assigned contracts, projects, or tasks.
  • Maintains office records and files. May collect time sheets and other personnel records or paperwork for corporate and government processing.
  • Performs other duties as assigned, such as Human Resources, Facilities, and Security functions.
  • Managing calendars, answering telephones, reviewing/editing and coordination of documents (including professional documents, memorandums, awards, OPRs, etc).
  • Making travel preparations (experience with eTrip is desired), maintaining office staff phone contact lists, track and order supplies
  • Meeting logistics and event support
  • Record meeting minutes and notes; distribute notices as applicable
  • Perform Program Records Officer (PRO) duties  
  • Backfill the Executive Admin

Position Requirements: 

  • Requires Bachelor’s degree or equivalent and two to four years of related experience, or 8-10 years w/High School Diploma.
  • Thorough understanding of administrative processes. 
  • Must be very responsive to tasking and able to work well independently and in groups.
  • Ability to use MS Office
  • Ability to use PC
  • Interpersonal and People Skills
  • Multi-Tasking Ability
  • Oral and Written Communication Skills
  • Organizational Skills
  • Typing Skills (50+ wpm)

Security Clearance Requirement:

Active/current TS/SCI with CI Polygraph is required.

Physical Requirements:

  • Must be able to be in a stationary position more than 50% of the time
  • Must be able to communicate, converse, and exchange information with peers and senior personnel
  • Constantly operates a computer and other office productivity machinery, such as a computer 


ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access as a result of your disability. To request an accommodation please click and provide your name and contact information.