Program Security Officer 3

Company: MANTECH
Location: Chantilly
Posted on: March 22, 2026

Job Description:

MANTECH seeks a motivated, career and customer-oriented Program Security Officer 3 (PSO 3) to join our team in Chantilly, VA. Responsibilities include but not limited to: Provide advice and assistance regarding a range of security issues and concerns to government and program security officers in different geographical locations Provides classification management, program security, information systems security, personnel security, and physical security to guide customers and industry partners Conduct briefings and indoctrinations to a variety of audiences Deliver compelling and articulate recommendations on current security issues for program security decisions to Directorate and Office Directors of Security, Program Managers, and Directorate leadership Assist in the development of security policies and implementation procedures Domestic Travel and OCONUS up to 25% Minimum Qualifications: HS Diploma and 12 or more years relevant security experience or Associates and 10 or more years relevant security experience or Bachelors Degree and 8 or more years relevant security experience or Masters and 6 years relevant security experience Ability to work high-level, complex or sensitive security issues thoroughly and with discretion Demonstrated ability to identify and assess multiple sources for classification determinations control, marking, and dissemination principles and requirements to include FOIA and Pre-publication reviews Substantive experience providing risk-managed security recommendations to program managers, in support of secure and successful mission accomplishment Familiarity with ICD 503, 705, DISS, and Scattered Castles Have a working knowledge and be able to implement Intelligence Community Directives as well as NRO Directives and Instructions Knowledge of program protection methodologies and risk management principles as they relate to appropriately protecting and sharing information, missions, operations, and assets Preferred Qualifications: Ability to assist the government in the NRO Integrated Security Assessment Program (ISAP) Experience working with industrial security staffs Security Program Oversight Manual (NISPOM) security policy and procedures Working knowledge of acquisition lifecycle security requirements Security Requirements: Must have a current/active TS/SCI w/Polygraph Physical requirements: Must be able to remain in a stationary position 50% Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. Frequently communicates with co-workers, management, and customers, which may involve delivering presentations Must be able to exchange accurate information in these situations

Keywords: MANTECH, Ellicott City , Program Security Officer 3, IT / Software / Systems , Chantilly, Maryland