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**MANTECH** seeks a motivated, career and customer-oriented **Senior Information System Security Officer (ISSO)** to join our team in **Fairmont, WV** .

In this critical full-time role, you will be responsible for the overall cybersecurity posture of a large-scale government enterprise. As a senior member of the team, you will serve as the principal advisor on all matters related to information systems security and compliance, ensuring that a government cybersecurity center maintains authorization to operate (ATO) and maintains a strong security posture against evolving threats.

Responsibilities include but are not limited to:

+ Lead the preparation of documentation and coordination with government and technical staff for annual A&A’s performed by government assessors.

+ Lead the development, maintenance, and oversight of system security plans (SSPs) and other RMF documentation required for system accreditation and authorization to operate (ATO).

+ Conduct continuous monitoring and internal audits to ensure compliance with government security standards and policies.

+ Advise and assist system administrators and engineers in the implementation and management of security controls.

+ Oversee the vulnerability management program, ensuring security patches and vulnerability mitigations are implemented in a timely manner.

+ Collaborate with the Cybersecurity Operations Center (CSOC) and other security teams during incident response efforts, providing expertise on system security and controls.

+ Develop and update security policies, procedures, and training materials to promote a culture of security awareness.

Minimum Qualifications:

+ 5+ years of experience as an ISSO or in a similar cybersecurity role, with a strong background in government or DoD environments.

+ In-depth knowledge of Windows and Linux operating systems, networking, and common cybersecurity tools.

+ Continuous monitoring and internal auditing experience.

**Preferred Qualifications** :

+ Professional certifications such as CISSP, CISM, or Security+ are preferred.

+ Extensive experience with the NIST Risk Management Framework (RMF) and other security control standards preferred.

Clearance Requirements:

+ Must have a current/active Top Secret clearance.

Physical Requirements:

+ Must be able to remain in a stationary position 50% and constantly operate a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

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. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at [email protected] and provide your name and contact information.