Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private defense and government solutions business specializing in advanced technology systems and mission support. Its capabilities include data science, software development, network engineering, intelligence, surveillance, and reconnaissance (ISR), and logistics.
Job DescriptionOverview
SOSi is seeking an experienced Special Programs Security Manager to work at its Reston, VA location with occasional travel to other SOSi sites, supporting a complex range of classified programs. The Security Manager will develop and implement security policies and procedures in coordination with the SOSi Vice President of Corporate Security and manage personnel, physical, and information security requirements for SCI and SAP activities.
Essential Job Duties
- Support multiple federal agencies with varying security standards and procedures, utilizing the NISPOM, ICDs, DoDM 5205.07 and other applicable directives, policies and procedures set forth by the DoD and Intelligence Community.
- Maintain SCIF and SAPF accreditations to include transference of cognizance (TOC) to appropriate Cognizant Security Agency (CSA).
- Conduct security education and training.
- Assist with the development, implementation and monitoring of security policies and procedures, to include the insider threat program.
- Provide security indoctrinations, debriefings, pre/post travel briefings and annual refresher briefings as necessary.
- Coordinate co-utilization agreements for facilities.
- Responsible for ensuring pre-screening of candidates occurs to mitigate risk to the government, and that accurate paperwork and information is submitted to the customers.
- Process SCI and SAP nominations for personnel supporting various efforts.
- Investigate security violations and submit required reports to the government.
- Document and maintain personnel security files and rosters.
- Establish and maintain successful working relationships with government and internal customers.
- Act as an advocate for the security program, using sound communication expertise and work with senior level managers to accomplish missions.
- Perform other duties as assigned.
- Responsible for facility access control support, intrusion detection, safes/locks, hardware, and doors.
- Initiate and coordinate facility work orders/repairs to ensure perimeter control is secure.
- Coordinate accreditation and reaccreditation of classified IS Systems with ISSM in accordance with U.S.G policies and regulations.
- Maintains SCIF / SAPF visitor control functions.
- Conduct SCIF / SAPF self-inspections in preparation for security audits.
- Prepare written SOPs and update annually for IC and SAP customer.
- Provide proposal support, including the writing and reviewing of security volumes.
Minimum Requirements
- Active in-scope TS/SCI with Poly.
- Self-starter who can work independently and manage their own schedule, travel, and workflow.
- Ability to obtain SAP Access.
Preferred Qualifications
- 3 years of experience working within SCI and SAP programs.
Additional Information
Work Environment
- Office Location is Reston, VA and other SOSi sites.
- Working conditions as normal for an office environment.
- Requires periods of non-traditional hours including consecutive nights or weekends when necessary.
- May require ability to lift/and or move objects or packages of up to 25 lbs.
Working at SOSi
All interested individuals will receive consideration and will not be discriminated against for any reason.
Skills Required
- Active in-scope Top Secret/Sensitive Compartmented Information clearance with polygraph
- Ability to obtain SAP access
- Ability to work independently and manage schedule, travel, and workflow
- At least 3 years of experience working within SCI and SAP programs
SOSi Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SOSi and has not been reviewed or approved by SOSi.
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Healthcare Strength — Health coverage is considered a relative strength, with international plan options and substantial employer contribution that support OCONUS and travel-heavy work. Company materials also highlight a comprehensive medical offering alongside wellness support.
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Retirement Support — A 401(k) program is available, with indications of employer matching though specifics are not publicly detailed. This suggests foundational retirement support for eligible employees.
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Career-Linked Recognition & Rewards — Compensation is often characterized as competitive for cleared, hard‑to‑hire, and certain overseas or mission‑critical roles. Pay levels appear closely tied to contract demands, clearance, and location.
SOSi Insights
What We Do
SOSi is a technology and services integrator focused on the aerospace, defense, and government services industry, described as one of the largest private, founder-owned companies in its sector.









