ManTech Senior Information Systems Security Officer in San Diego, California

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

As the Senior Information System Security Officer (ISSO) you must have an understanding of and be able to validate the cyber security policies and procedures for a DoD information system. In this role, you will support classified programs and the Information System Security Manager (ISSM) by:

Responsibilities Include but not limited to:

  • Ensuring all Information Systems (IS) are certified and accredited in compliance with the security requirements per NIST Risk Management Framework (RMF)

  • Ensuring each network or system is operated, maintained and disposed of in accordance with DoD security policies and practices and System Security Plan.

  • Assisting the ISSM with RMF steps; Categorize, Select, Implement, Assess, Authorize as needed

  • Performing Continuous Monitoring

  • Develop, improve and implement auditing techniques and procedures as needed to meet systems cybersecurity compliance requirements.

  • Ensuring Audit Reviews and risk assessments are conducted periodically for each network or system to identify specific areas that require safeguards against deliberate or inadvertent unauthorized disclosure, modification, destruction of information, denial of service, and unauthorized use of IS. Ensure audit records are collected, reviewed, and documented.

  • Initiate approval from ISSM for protective and corrective measures when vulnerabilities are discovered

  • Ensuring all security-related incidents are documented and reported to the ISSM and Security Officer

  • Develop and maintain System Security Plans and related documentation for each supported network/system

  • Ensure configuration management procedures for software, hardware and firmware are maintained or developed as required.

  • Ensure systems recovery processes are monitored and all security features reinstated.

  • Perform systems security audit on a weekly basis to detect unauthorized activities and ensure systems maintain security compliance.

  • Formally notify ISSM and DAA when systems are no longer used to process classified info

  • Notify ISSM when system changes occur that effect security compliance and accreditation

  • Validate that system security is implemented during all phases of system life-cycle

  • Follow evaluation and authorization process for software, hardware and firmware updates before implementation

Position Requirements:

  • Requires Bachelors degree or equivalent and five to seven years of related experience

  • Must be knowledgeable of the Department of Defense (DoD) information system security compliance and implementation guidance. Specifically, NIST Risk Management Framework (RMF)

  • Possess and maintain one of the following DoD 8570 certifications (CCNA Security, GIC SP, GSEC, Security+CE, SSCP, CAP or GSLC)

  • Working knowledge of IT systems technical function, security policies, security safeguards and operations security measures. Specifically, Microsoft Windows 7/10 and Server 2012/2016 security technical configuration and event log auditing preferred

  • Microsoft and VMware certifications a plus

  • Up to 5% CONUS travel

Security Requirements: U.S. Citizenship and an active Secret clearance within the last 5 years


Requires Bachelor¿s degree or equivalent and five to seven years of related experience.


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ManTech International Corporation is comprised of approximately 7,300 talented employees who use advanced technology to help government and industry meet some of their greatest challenges 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. Nearly half our employees have a military background, and approximately 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, health, space, and intelligence communities; we hold nearly 1,100 active contracts with more than 50 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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