
Defending the Nation Through Advanced Technology
ManTech stands as a premier technology and consulting company dedicated to advancing national security through innovative solutions. Founded in 1968 with a single Navy contract, this publicly-traded organization has evolved into a multibillion-dollar enterprise serving the U.S. Government across defense, intelligence, law enforcement, science, administration, and healthcare sectors. Headquartered in Herndon, Virginia, ManTech employs over 9,800 talented professionals nationwide, with nearly 40% being military veterans who bring firsthand mission experience to their roles.
Mission Critical Expertise
ManTech specializes in cybersecurity, data collection and analysis, enterprise IT, and systems and software engineering. The company's comprehensive approach addresses the government's most complex challenges through cutting-edge technology and deep domain expertise. With extensive operations across Virginia, Maryland, Washington DC, Colorado, and Texas, ManTech delivers solutions that directly impact national security and public welfare.
Purpose Driven Work Environment
At ManTech, work extends beyond technology-it represents a commitment to public trust and service. Employees contribute directly to protecting communities, supporting service members and veterans, and advancing healthcare initiatives.
Career Growth and Culture
- Nearly half of employees are veterans, creating a mission-driven work environment
- Strong emphasis on public service and national security contributions
- Comprehensive benefits supporting professional development and career advancement
- Collaborative teams with Intelligence Community and federal agency backgrounds
- Opportunities to work on classified projects requiring security clearances
- Technical leadership roles for experienced cyber professionals
- Incident response and security operations expertise valued and developed
Why Professionals Choose ManTech
Federal managers and military leaders trust ManTech because team members understand customer challenges firsthand, having served in similar roles throughout government agencies. This insider perspective enables ManTech to deliver precise, effective solutions while fostering long-term professional relationships built on expertise and reliability. The 4.2 Glassdoor rating reflects a workplace culture that values creativity, energy, and dedication to serving the country.
Mission
Advancing national security through innovative technology solutions and mission-critical expertise that serve the U.S. Government and protect American communities.
Frequently Asked Questions
Jobs for ManTech in United States
40+ results
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ManTech90012 Los Angeles, CA
ManTech20151 Chantilly, VA
ManTech22150 Springfield, VA
ManTech20151 Chantilly, VA
ManTech22554 Stafford, VA
ManTech20036 Washington, DC
ManTech87106 Albuquerque, NM
ManTech63103 St. Louis, MO
ManTech20151 Chantilly, VA
ManTech63010 Arnold, MO
ManTech22554 Stafford, VA
ManTechNellis Air Force Base, NV
ManTech20036 Washington, DC
ManTech96744 Honolulu County, HI
ManTech96744 Honolulu County, HI
ManTechNellis Air Force Base, NV
ManTech22134 Quantico, VA
ManTech90012 Los Angeles, CA
ManTech63103 St. Louis, MO
ManTech20036 Washington, DC

Activity Security Representative
Description
MANTECH seeks a motivated, career and customer-oriented Activity Security Representative II to join our team in El Segundo, CA.
The Activity Security Representative's primary function is to provide multi-disciplined security support to a customer's facility and organization. The position will provide "day-to-day" support for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities.
Responsibilities Include But Are Not Limited To
- Assist in the maintenance of a document accountability database and associated correspondence.
- Implement Top Secret Control for accountable material and associated correspondence.
- Prepare and/or process inbound and outbound classified mail, faxes, courier packages and receipts.
- Prepare, process, and/or review Program Access Request (PARs) for accuracy and access eligibility.
- Execute Special Access Program Nomination Process Questionnaires
- Conduct Defense Central Index of Investigations (DCII), Joint Personnel Access System (JPAS), and SAPNP reviews of candidates being submitted for SAP access.
- Perform data entry and record checks in the Joint Access Database (JADE) and maintains all customer sponsored personnel access information current.
Minimum Qualifications
- Bachelor's degree in a related field or 4 additional years of direct experience will be considered in lieu of degree.
- 6 + years of relevant experience.
- 3 + years of experience with SCI.
- Must be familiar with security policy/manuals and the appropriate ICDs/JAFANs/DOD Manuals and other guiding policy documents
Preferred Qualifications
- 1+ year relevant experience with SAR programs desired.
- Working knowledge of Microsoft Office (Word, PowerPoint, and Excel)
Clearance Requirements
- Current Top Secret Clearance with SCI Eligibility
- Eligibility for access to Special Access Program Information
- Willingness to submit to a polygraph.
Physical Requirements
- Must be able to remain in a stationary position 50%.
- The person in this position frequently communicates with co-workers, management and customers, which may involve delivering presentations.
- Must be able to exchange accurate information in these situations.
- Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

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