ManTech Information Systems Security Officer (ISSO) III in Chantilly, Virginia

Become an integral part of a diverse team that leads the world in the Mission, Cyber, and Intelligence Solutions group. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer oriented Information Systems Security Officer (ISSO) III to join our team in the Chantilly, VA area to provide unparalleled support to our customer and to begin an exciting and rewarding career within ManTech.

Responsibilities include, but are not limited to:

• ISSOs provide assistance on information system security issues affecting the customer s mission by implementing the appropriate security practices, policies and technologies.

• Performing site lead tasks and responsibilities to include managing personnel

• Acting as one of the customer s key Subject Matter Experts

• Maintaining operational security posture for information systems

• Conducting risk assessment analysis to support Assessment and Authorization (A&A)

• Preparing and reviewing A&A documentation in accordance with ICD 503

• Supporting industry partners with their A&A efforts

• Providing support and expertise to various high-level technical working groups

Position Requirements:

• Master s degree and 5 or more years of relevant experience, or; Bachelor s degree and 8 or more years of ISSO experience, or; Associate s degree and 12 or more years of relevant experience, or; High School Diploma/GED and 15 or more years of relevant experience

• In-depth knowledge of information system security principles

• Ability to lead, and to build rapport with military, civilian, and contractor personnel at all levels

• Thorough understanding of IC and DoD policies, procedures and operating instructions

• CISSP certification required to be considered for this position

Security Requirements:

Must possess an active TS/SCI w CI Poly.


Requires Bachelor¿s degree or equivalent and over ten years of related experience and ability to obtain a security clearance. Knowledge of DOD, DOE, other industrial security program and in-depth, or government security regulatory manuals.


Bachelor's Degree, See Qualifications

Years of Experience

08-10 years w/High School Diploma, 11-13 years w/High School Diploma, 07-09 years w/Bachelors Degree, 05-07 years w/Masters Degree, See Qualifications

Position Type





For more than 40 years, ManTech employees have been solving complex problems for the national security community. We are comprised of approximately 10,000 talented employees around the world. We adhere to the simple, no-nonsense values on which ManTech was founded more than four decades ago, aligning squarely with the mission objectives of our customers. As our customer base continues to expand and diversify, we continue to diversify our workforce and solutions. Half our employees have a military background, and more than 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, space, and intelligence communities; we hold nearly 1,000 active contracts with more than 40 different government agencies.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Waretime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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