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General information

Requisition #
R70000
Locations
USA-VA-Chantilly
Posting Date
08/13/2026
Security Clearance Required
TS/SCI
Remote Type
Onsite
Time Type
Full time

Description & Requirements

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!

MANTECH is seeking a motivated, career and customer-oriented Information System Security Officer (ISSO) to join our team in Chantilly, VA.

Responsibilities include but are not limited to:

  • Ensures network nodes are operated, maintained, and disposed of in accordance with security policies and practices.

  • Perform Information System Security Officer (ISSO) duties in support of in-house and external customers. Also, perform duties as the alternate Information Systems Security Manager (ISSM).

  • Cyber security paperwork (compliance) and Information Assurance (IA) controls.

  • Develop supporting documentation and apply standards, directives, guidance, policies, and security control to classified computing environments in support of Intelligence Community Directive (ICD) 503

  • Utilizing one or more Risk Management Framework implementation methods to include but not limited to; JSIG, CNSSI 1253, NIST SP 800-53, NIST SP 800-171, DoDM-5220-22 (NISPOM)

  • Assist in preparation and review documentation to include System Security Plans (SSPs), Risk Assessment Reports (RAR), Security Controls Traceability Matrix (SCTM), and other Assessment & Authorization (A&A) artifacts

  • Learn and conduct independent scans of the application, network, and database with tools such as Nessus, DISA STIGS compliance check and SCAP (SCC)

Minimum Qualifications:

  • Bachelor’s Degree and at least 5 years of experience in Cybersecurity, Information Technology, Computer Science, or other relevant technical field; Experience can be any combination professional experience, internships, lab work or coursework. An additional 2 years of experience may be substituted in lieu of degree.

  • At least three years’ experience with Risk Management Framework, JSIG, or similar security frameworks.

  • Department of Defense (DoD) 8570/8140 Compliant, IAT Level III within 6 months of hire date

  • Strong Analytical and Critical Thinking Skills, Interpersonal and People Skills, Leadership Skills, Listening Skills, Multi-Tasking Ability, Communication Skills, Organizational Skills, Presentation Skills

Preferred Qualifications:

  • Ability to obtain and maintain customer system accreditations through the System Development Life Cycle (SDLC)

  • Experience providing continuous monitoring, security reviews, and technical inspections to enforce security policies, controls and procedures and mitigate identified vulnerability and weaknesses

  • Ability to work well in a team environment and work well under pressure.

Security Clearance Requirements:

  • Must have a current / active Top-Secret/SCI clearance with the ability to obtain and maintain a polygraph

  • Eligibility for access to Special Access Program information (SAP)

Physical Requirements:

  • Must be able to remain in a stationary position up to 75% of the time

  • Must be able to move about inside the office to access file cabinets, office machinery

  • Must be able to position self to maintain office supplies on variable height shelving.

  • 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


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.

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.