About the role
Job Summary
Seeking an experienced Information Systems Security Officer (ISSO) to support mission-critical Department of Defense (DoD) and Intelligence Community (IC) programs
As an ISSO, you will play a vital role in protecting classified information systems, maintaining cybersecurity compliance, and supporting the operational security posture of enterprise environments
You will work closely with system owners, engineers, cybersecurity teams, and government stakeholders to ensure information systems comply with federal cybersecurity requirements, Risk Management Framework (RMF) standards, and organizational security policies
The ideal candidate has experience managing day-to-day cybersecurity operations, conducting security assessments, supporting system authorization activities, and ensuring secure operation of complex information systems throughout their lifecycle.
Primary Responsibilities
Serve as the Information Systems Security Officer (ISSO) for assigned information systems and support the Information System Security Manager (ISSM) in maintaining the overall security posture
Support the organization's Information Assurance (IA) and cybersecurity program by ensuring compliance with applicable federal, DoD, and Intelligence Community security requirements
Plan, coordinate, implement, and enforce information system security policies, standards, and procedures across assigned systems and projects
Maintain the operational security posture of mission-critical information systems through continuous monitoring, security assessments, and compliance activities
Monitor system security controls and support incident response, vulnerability management, and remediation efforts
Conduct vulnerability assessments, security reviews, and risk assessments to support Risk Management Framework (RMF) authorization and continuous monitoring activities
Evaluate hardware, software, and security solutions to ensure compliance with requirements for processing classified and sensitive information
Assess proposed system changes, perform security impact analyses, and support configuration management activities
Develop, maintain, and review cybersecurity documentation, including:
System Security Plans (SSPs)
Risk Assessment Reports (RARs)
Risk Management Framework (RMF) authorization packages
Security Assessment Reports (SARs)
Plans of Action and Milestones (POA&Ms)
System Requirements Traceability Matrices (SRTMs)
Coordinate with system administrators, network engineers, software developers, and government representatives to implement security controls and resolve cybersecurity issues
Support security audits, inspections, and compliance reviews while maintaining accurate security documentation and audit artifacts
Assist in developing security awareness initiatives and promoting cybersecurity best practices across supported programs
Required Qualifications
Must have active Top Secret/SCI clearance with NSA Full Scope Polygraph
Minimum of five (5) years of experience as an Information Systems Security Officer (ISSO) supporting programs of similar scope, type, and complexity
Experience in one or more of the following areas:
Information Assurance (IA) and cybersecurity operations
Security tools and vulnerability management
Hardware and software security implementation
Network communication protocols
Encryption technologies and cryptographic solutions
Bachelor's degree in Computer Science, Cybersecurity, Information Systems, Information Assurance, or a related technical discipline from an accredited college or university.
Four (4) additional years of ISSO experience may be substituted in lieu of the degree requirement
DoD 8570 Information Assurance Management (IAM) Level I certification (or higher) is required
Strong knowledge of the Risk Management Framework (RMF), NIST Special Publications, Committee on National Security Systems (CNSS) policies, and DoD cybersecurity requirements
Experience supporting system authorization, continuous monitoring, and cybersecurity compliance activities
Knowledge of vulnerability management, security control implementation, and risk assessment methodologies
Experience preparing and maintaining RMF security documentation and authorization packages
Familiarity with enterprise security tools, vulnerability scanners, and system monitoring solutions
Experience supporting configuration management and evaluating security impacts of system changes
Strong understanding of access control, authentication, encryption, and secure systems administration
Excellent analytical, organizational, troubleshooting, and documentation skills
Strong written and verbal communication skills with the ability to work effectively across multidisciplinary technical teams
Desired Qualifications
Experience supporting Authorization to Operate (ATO) activities within DoD or Intelligence Community environments
Experience using Enterprise Mission Assurance Support Service (eMASS) or similar authorization management tools
Experience with Security Technical Implementation Guides (STIGs), Security Requirements Guides (SRGs), and security compliance validation
Familiarity with vulnerability management tools such as Tenable Security Center, Nessus, or ACAS.
Experience supporting cloud, hybrid cloud, or virtualized enterprise environments
Knowledge of Security Information and Event Management (SIEM) platforms and continuous monitoring technologies
Experience working within Agile or DevSecOps environments
Familiarity with incident response, cybersecurity operations, and enterprise risk management
Exempt hourly position. 11 paid holidays, minimum of 3 weeks PTO, company sponsored group medical plan, company paid dental, vision, life insurance, and STD/LTD plans. Salary is dependent upon the candidate’s experience and qualifications.
Momentum Engineering, Inc. fosters an employee-centric culture. Our strength lies in our people. With a high percentage of employees holding advanced degrees in engineering, computer science, and related disciplines, we bring deep technical expertise to every mission. Our team includes professionals with security clearances and full-scope polygraphs, ensuring trusted, secure support for the most sensitive national security initiatives. Additionally, our workforce is equipped with industry-leading certifications, demonstrating a commitment to continuous learning and excellence. Most importantly, our exceptional employee retention rate reflects a culture of professional growth, mission focus, and dedication—ensuring long-term stability and expertise for our customers’ critical needs.