Information Systems Security Officer, Level 1

Markon

. Implement, maintain, and enforce information systems security policies, standards, and procedures in accordance with DoD and Intelligence Community requirements .

Posted 10/15/2026full-timeAnnapolis Junction • Maryland • United StatesMid-LevelSenior💰 $155,000 - $165,000 per yearWebsite

Tech Stack

Tools & technologies

Cyber SecuritySplunkTypeScript

About the role

Key responsibilities & impact

Implement, maintain, and enforce information systems security policies, standards, and procedures in accordance with DoD and Intelligence Community requirements
Support Risk Management Framework activities, including system authorization, continuous monitoring, and security compliance assessments
Develop and maintain security documentation, including system security plans, risk assessments, certification and accreditation packages, and security requirements traceability matrices
Monitor security events, analyze system logs, and support incident detection and response using Splunk
Evaluate security risks, vulnerabilities, and proposed security solutions to protect classified information systems
Maintain configuration management records for security-related hardware, software, firmware, and system changes
Review system modifications and upgrades to assess security impacts and ensure continued compliance
Support security managers in maintaining the operational security posture of assigned systems, programs, and enclaves
Administer and monitor user identification, authentication, and access control processes
Coordinate with system administrators, engineers, and security personnel to resolve security findings and implement corrective actions

Requirements

What you’ll need

Active TS/SCI clearance with Polygraph required
Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related technical field; four additional years of ISSO experience may be substituted for the degree
5+ years of experience as an Information Systems Security Officer supporting programs or contracts of similar scope, type, and complexity
DoD 8570 IAT Level I certification or higher required
Experience with at least one of the following: security tools, hardware/software security implementation, communication protocols, or encryption technologies
Experience supporting system authorization, security compliance, and Risk Management Framework activities
Experience developing and maintaining system security plans, risk assessments, and security authorization documentation
Experience monitoring security events and analyzing logs using Splunk
Knowledge of information systems security policies, configuration management, and access control procedures
Strong analytical, troubleshooting, documentation, and communication skills
Experience supporting classified DoD or Intelligence Community information systems
Familiarity with NIST security controls, ODNI policies, and DoD cybersecurity requirements
Experience with vulnerability assessment tools, security scanning, and continuous monitoring
Experience supporting system authorization packages and audit readiness activities
Experience collaborating with security managers, system administrators, and engineering teams to maintain system security compliance

Benefits

Comp & perks

Medical
Dental
Vision
Life Insurance
Short-Term Disability
Long-Term Disability
401(k) match
Flexible Spending Accounts
EAP
Training and Tuition Assistance
Paid Time Off
Holidays
Professional growth and development opportunities
Equal Opportunity Employer