Information Systems Security Officer (ISSO)

Job Title: Information Systems Security Officer (ISSO)
Location: On-Site, Arlington, TX
Employment Type: Contract-to-Direct Hire
Industry: Defense & Aerospace
Compensation: $59/hr. (target)
Schedule: 9x80 | 1st Shift

Join a Classified Cyber Security Team as an Information Systems Security Officer (ISSO), where you'll play a key role in protecting critical DoD systems and ensuring compliance with evolving cybersecurity requirements. In this role, you'll combine hands-on technical expertise with collaboration and leadership to guide systems through the Risk Management Framework (RMF) lifecycle.

We are specifically seeking individuals who have direct, hands-on experience executing vulnerability management, STIG implementation, and RMF activities across all phases-not just supporting or monitoring these efforts. This role requires a practitioner who has owned and driven security actions end-to-end in real-world environments.

If you're passionate about cybersecurity, continuous improvement, and supporting mission-critical programs, this is an opportunity to make a real impact.

• Lead cybersecurity compliance efforts by applying RMF and DAAPM guidance to support system authorization and continuous monitoring
• Perform hands-on vulnerability management, including scanning, analysis, remediation, and validation
• Execute and maintain STIG implementations across systems, ensuring compliance with DoD security baselines
• Develop and maintain security documentation, ensuring systems meet accreditation and government certification requirements
• Actively identify vulnerabilities and indicators of compromise (IOCs), and personally drive remediation efforts
• Collaborate with engineers, architects, and developers to design and maintain secure system architectures
• Conduct audits, vulnerability assessments, and incident investigations
• Support offsite teams and travel as needed to ensure compliance and operational readiness

• Proven experience personally executing RMF activities, including system categorization, control implementation, assessment support, and authorization
• Demonstrated hands-on experience with STIGs and system hardening (especially Linux environments)
• Direct experience using ACAS (Nessus) for vulnerability scanning, including policy configuration and tuning
• Strong understanding of DoD cybersecurity frameworks and compliance requirements
• Ability to work independently and take ownership of security processes from start to finish

• Bachelor's degree in a STEM field
• Current DoD 8570.01-M IAT Level II certification
• Minimum of 5 years of experience with cybersecurity frameworks and standards such as NIST SP 800 series, FIPS, JSIG, DAAPM, or ICD
• Minimum of 5 years of experience supporting authorization and approval (A&A) processes for classified information systems
• Minimum of 3 years of experience auditing Windows/Linux security logs and conducting vulnerability scans

• What Sets You Apart:
  Experience supporting cybersecurity efforts within collateral, SAP, or SCI environments
• Familiarity with Windows and Linux operating systems in secure environments
• Experience with SIEM and compliance/vulnerability scanning tools (e.g., Splunk, Nessus, ACAS, SCAP, STIG Viewer)

• In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire.
• Successful candidate must be able to obtain and maintain DoD Personal Security Clearance.
• Upon offer of employment, the individual will be subject to a background check and a drug screen

• Ability to effectively communicate with technical teams, leadership, and external stakeholders, with strong written and verbal communication skills
• Demonstrated critical thinking, problem-solving abilities, and the ability to manage multiple priorities in a dynamic environment
• Willingness and ability to travel up to 50% as needed