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# Information Systems Security Officer (isso)

- **Company:** Markon, LLC.
- **Location:** Annapolis, MD, United States
- **Experience:** Expert
- **Salary:** $200,000.0
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Information Systems, Identity and Access Management, Information Security Management, Plex
- **Published:** September 1, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9131277/information-systems-security-officer-isso

## About the Role

* Active TS/SCI W/ Polygraph
 * Bachelor's degree plus 8-years of relevant experience (OR) Master's degree plus 6-years of relevant experience. An Associate's degree or 18 semesters hours of military coursework/training in a computer-related field plus 10-years of relevant experience (OR) high school diploma/GED plus 12-years of relevant experience may be considered.
 * Information Assurance Manager (IAM) Tier 1 certification is required

Desired Qualifications:

 * Experience as an ISSO/ISSE with emphasis on Defense-in-Depth principles, network, and enterprise security architecture

 * Experience applying the principles of the NIST 800-53 including the procedures in the Risk Management Framework (RMF)

 * Familiarity with STE/STN requirements

 * Excellent written and oral communication skills

## Description

PLEX Solutions, A Part of Markon is looking for a self-starting, motivated individual to be the Information System Security Officer supporting Enterprise Discovery lab with maintaining compliance and strengthening the security posture of critical mission systems via the Risk Management Framework.

Responsibilities

 * Ensure the appropriate operational security posture is maintained for an information system

 * Support continuous monitoring of networks to detect and correct areas of security non-compliance, unmitigated vulnerabilities, and other risks

 * Follow consistent security processes and play a role in the information systems continuous monitory program

 * Perform regular audits of information systems

 * Assist the information systems security manager in preparing the information system for periodic reaccreditation


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