Location
Fairmont
Job Type
Full-time
Posted
July 17, 2026
Job Description
**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).
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).
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