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# Senior ISSO

- **Company:** Tetra Tech
- **Location:** Arlington, VA, United States
- **Experience:** Expert
- **Salary:** $130,000.0 - $135,000.0
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Document-Oriented Databases, Software Engineering, Systems Architecture, HP WebInspect, Information Technology, Nessus, Appscan, Splunk, Plan of Action and Milestones
- **Published:** July 18, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=a01292a3b21106b8

## About the Role

* 8 years of IT cybersecurity experience including direct support for the US Government and 4 years acting as an ISSO, assessor, or compliance analyst OR
 * A relevant bachelor's degree in IT, Computer Science or Engineering and 5 years of IT cybersecurity experience including direct support for the US Government and 4 years acting as an ISSO, assessor, or compliance analyst.
 * At least one of the following security certifications including but not limited to: CAP, CGRC, CISSO, CISM, or CISSP. The Government will determine if other applicable certifications are acceptable upon contractor submittal.
 * Demonstrated knowledge and application of NIST Guidelines and FISMA Cybersecurity compliance requirements.
 * Demonstrated experience with all phases of the NIST Risk Management Framework (RMF)
 * Knowledge of and experience using relevant cybersecurity and analysis tools such as Archer, Nessus Security Center, Splunk, etc.
 * Experience communicating effectively, both oral and written, with technical, non-technical, and executive-level customers.
 * Must have active SECRET Clearance
 * Must be located in DC/MD/VA, * In-depth knowledge of laws, directives, orders, etc., pertaining to IT security and directing Federal government agencies.
 * Technical background such as Network Engineering, Systems Administration, and Application Development. Hands on experience working with security tools like NESSUS, AppDetective, Web Inspect, AppScan, etc.
 * Strong written and oral communications skills
 * Ability to quickly adapt to customer, environment, policies, procedures, etc.
 * Proactive and self-directed workstyle
 * Ability to prioritize tasks in a fast-paced environment

## Description

* Assess, review, update, and develop security authorization and accreditation documentation to ensure consistency with laws, regulations, and best practices as it pertains to the systems and customer requirements.
 * Work closely with Federal customers to develop and update security-related documentation to reflect the security posture of the IT system, as directed by the government and federal program managers.
 * Prepare or assist in the preparation of other security documentation or reports as required to support customer engagements.
 * Support ISSOs in their responsibilities for systems including Enterprise security support and risk management and system weakness management (POA&M maintenance for the Risk Management Framework Portal (RMFP)).
 * Assist the Federal customer in reviewing or modifying security documentation to ensure it maintains quality and accuracy in customer products.
 * Work with Engineers and System Administrators to properly document data flows, system architecture, and other necessary diagrams/charts.
 * Work with various security tools including NESSUS, AppDetective, Web Inspect, AppScan, etc.
 * Provide administrative support as necessary, to include, but not limited to:
*

 + Compile, or provide input to, weekly customer status reporting (e.g. deliverables completed) and project plans
 + Assist with meeting minutes and action items as need
 + Attend customer meetings in person, unless otherwise noted
 * Advocate industry best practices on behalf of EGT Cyber Solutions Practice. Contribute to EGT business development goals by creating and developing white papers and innovative solutions.


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