<p>General information</p> <p>Requisition #</p> <p>R66883</p> <p>Locations</p> <p>USA-CA-El Segundo</p> <p>Posting Date</p> <p>03/27/2026</p> <p>Security Clearance Required</p> <p>TS/SCI</p> <p>Remote Type</p> <p>Onsite</p> <p>Time Type</p> <p>Full time</p> <p>Description & Requirements</p> <p>Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!</p> <p>MANTECH seeks a motivated, career and customer-oriented Activity Security Representative (ASR) - I to join our team in El Segundo, CA.</p> <p>The Activity Security Representative (ASR) - I will leverage their strong technical background and knowledge to provide multi-disciplined security support to a customer's facility and organization. You will provide day-to-day support for Collateral, Sensitive Compartmented Information (SCI), and Special Access Program (SAP) activities in a full-time, in-office capacity.</p> <p>Responsibilities include but are not limited to:</p> <ul> <li> <p>Conducting classification reviews of inbound and outbound correspondence and maintaining document accountability databases.</p> </li><li> <p>Processing and destroying classified materials and magnetic media while maintaining daily administrative logs for document control.</p> </li><li> <p>Assisting in the processing and electronic transfer of data files to internal customers and maintaining extensive point of contact listings.</p> </li><li> <p>Researching and filing inbound and outbound visit notices and escorting facility visitors while maintaining associated logs.</p> </li><li> <p>Conducting entry and exit inspections and assisting in the preparation of facility access control badges and entry system maintenance.</p> </li><li> <p>Performing data entry into personnel security databases and maintaining customer-sponsored billets and quota information.</p> </li><li> <p>Enforcing customer Standard Operating Procedures and providing support for security awareness and education programs.</p> </li></ul> <p>Minimum Qualifications:</p> <ul> <li> <p>Bachelor's degree or equivalent additional experience (4 years).</p> </li><li> <p>2+ years of experience</p> </li><li> <p>1+ years with SCI or SAR programs.</p> </li><li> <p>Must complete DoD SAPCO approved SAPNP training within six months of starting on the contract if performing SAP personnel security functions.</p> </li><li> <p>Familiarity with SIMS database or completion of training within six months of hire if performing document control functions.</p> </li><li> <p>Completion of JPAS/DISS training within six months of hire if performing SCI personnel security functions.</p> </li><li> <p>Completion of Joint Access Database Environment (JADE) training within six months of hire if performing SAP personnel security functions.</p> </li></ul> <p>Preferred Qualifications:</p> <ul> <li> <p>Familiarity with security policy manuals and other guiding policy documents used in Government contracting environments.</p> </li><li> <p>Self-starter with excellent people skills-able to work in dynamic environments and interact effectively with DOD, military, and industry partners.</p> </li><li> <p>Working knowledge of Microsoft Office (Word, PowerPoint, and Excel) and a high degree of initiative requiring minimal supervision.</p> </li></ul> <p>Clearance Requirements:</p> <ul> <li> <p>Current Top-Secret Clearance with SCI Eligibility and eligibility for access to Special Access Programs.</p> </li><li> <p>Willingness to submit to a polygraph.</p> </li></ul> <p>Physical Requirements:</p> <ul> <li> <p>Must be able to remain in a stationary position 50% of the time in closed-area offices.</p> </li><li> <p>Needs to occasionally move about inside and out of the office to access files, cabinets, and safes.</p> </li><li> <p>Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.</p> </li><li> <p>Must be able to exchange accurate information in these situations.</p> </li><li> <p>Must be willing to travel within the organizational Area of Responsibility via air and ground transportation.</p> </li></ul> <p>The projected compensation range for this position is $91,600.00-$153,800.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.</p> <p>MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.</p> <p>If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.</p>