Program Security Officer 3

General information

Requisition # R66656 Locations USA-VA-Chantilly Posting Date 03/13/2026 Security Clearance Required TS/SCI w/ Poly Remote Type Onsite Time Type Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

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 Bachelor’s 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 with 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

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.

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.