Information System Security Officer (ISSO) with Linux & Windows Administration Experience

Job Title: Information System Security Officer (ISSO)

Location: Colorado Springs, Colorado
Employment Type: Full-time
Clearance Required: Active DoD Secret (or higher preferred)

About the Role

We are seeking a highly skilled and motivated Information System Security Officer (ISSO) to join our team in Colorado Springs, CO. This position is ideal for professionals with a strong background in Linux and Windows systems administration and with prior ISSO experience in restricted environments.

As an ISSO, you will be responsible for maintaining the security posture of classified and unclassified systems, ensuring compliance with NIST and DoD cybersecurity regulations, and supporting the Information System Security Manager (ISSM) in implementing best practices across various technical environments.

Key Responsibilities

• System Administration
• Administer and secure both Linux and Windows operating systems in accordance with organizational and DoD standards.
• Implement, manage, and document system configurations and hardening using STIGs (Security Technical Implementation Guides) and SCAPs (Security Content Automation Protocol) tools.
• Cybersecurity Compliance
• Ensure systems comply with NIST SP 800-53, RMF (Risk Management Framework), and DoD 8500 series standards.
• Conduct vulnerability scans, interpret results, and coordinate remediation in a timely and effective manner.
• Maintain security documentation including System Security Plans (SSPs), POA&Ms, and continuous monitoring artifacts.
• Security Operations & Monitoring
• Participate in security audits, system assessments, and incident response activities.
• Assist in managing security controls and identifying improvements to overall cyber hygiene.
• Support investigations of anomalies, logs, and alerts related to cybersecurity events.
• Collaboration & Reporting
• Work directly with ISSM, IT operations teams, and system owners to align systems with security and business objectives.
• Provide regular reporting on security status, vulnerabilities, and compliance posture to leadership.
• Additional Duties
• Perform other security-related tasks as directed by the ISSM or senior leadership.
• Maintain awareness of evolving threats and compliance requirements relevant to federal contracting and DoD systems.

Required Qualifications

• U.S. Citizenship and ability to obtain/maintain a DoD security clearance.
• 3–5+ years of hands-on experience in Linux and Windows systems administration in a secure environment.
• Proven experience with STIG compliance, vulnerability remediation, and system hardening.
• Familiarity with eMASS, ACAS, HBSS, and related DoD security tools.
• Strong understanding of RMF, NIST SP 800-53, and general cybersecurity frameworks.
• Excellent troubleshooting, documentation, and communication skills.

Preferred Qualifications

• Active Security+, CISSP, CASP+, or equivalent DoD 8570-compliant certification.
• Previous experience working in a DoD or federal contractor environment.

Why Join Us?

• Work in a mission-critical, security-driven environment that supports national defense.
• Be part of a collaborative team that values innovation, trust, and excellence.
• Enjoy professional development support and a strong company culture focused on cybersecurity impact.

Job Type: Full-time

Pay: $110,000.00 - $140,000.00 per year

Benefits:

• 401(k)
• Dental insurance
• Health insurance
• Paid time off
• Professional development assistance
• Vision insurance

Work Location: In person