Information System Security Officer (ISSO)

Amentum; Texas; On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Health, dental, vision insurance

401(k) matching

Job summary

Amentum is seeking an Information System Security Officer (ISSO) to support DoD SSP program offices. The ISSO will oversee cybersecurity for non-enterprise systems and travel regularly to SPHQ and field activities, ensuring proper security posture and authorization packages.

The role requires a BS in Cybersecurity/CS/CE, a Security+ or equivalent, and an active TS clearance with US citizenship. Travel about 40% and collaboration with program offices, contractors, and engineers are key aspects of

Qualifications

• Bachelor-level cybersecurity/engineering degree or equivalent.
• Security+ or equivalent certification.
• Ability to work with large, technical teams.
• Must have active US Government TS clearance and US citizenship.

Responsibilities

• Ensure systems are accredited and procedures are in place.
• Maintain residual cybersecurity risk within acceptable levels.
• Develop and update cybersecurity documentation.
• Implement SSP responses to DoD IAVAs/IAVBs.
• Initiate investigations for security events and take corrective actions.
• Coordinate with URs and ISSM on incidents and authorization packages.
• Collaborate in engineering reviews and develop system security plans.

Skills

BS in Cybersecurity / CS / CE

Security+ certification

Active TS clearance

Travel 40%+

Education

Bachelor of Science in Cybersecurity / CS / CE

Job description

Information System Security Officer (ISSO)

Amentum is hiring an Information System Security Officer (ISSO) to support Program Offices within Department of War Strategic Systems Programs (SSP). The ISSO will support non-enterprise information systems of large-scaled programs of record (POR), as well as multiple Science and Technology (S&T) programs. The System ISSO will provide direct support to the Program Office Technical Lead onsite at NSWC Crane and will be expected to travel regularly to SPHQ or Field Activities. The System ISSO is responsible for ensuring that the appropriate operational Cybersecurity posture is maintained for the systems under their purview. They ensure that the applicable system level security objectives are defined for implementation and assist in creating the security authorization package.

Specific Job Duties and Responsibilities

• Ensure systems are accredited, and the standard operating procedures include required security procedures.
• Ensure that the systems are operated and maintained such that they stay within the accepted level of residual Cybersecurity risk.
• Ensure that Cybersecurity documentation is developed, maintained, and updated as required.
• Implement SSP responses to DoD IAVAs and IAVBs.
• Initiate investigative procedures for security events, and institute protective or corrective measures when a security incident or vulnerability is discovered.
• Report in conjunction with the User Representative (UR) to the branch ISSM on Cybersecurity incidents.
• Work with the URs to ensure that incident response plans and contingency plans are developed and tested prior to system operation and annually thereafter, and results documented in the Security Authorization Package.
• Participate in all engineering reviews for systems under their cognizance.

Additional Job Duties and Responsibilities

• In alignment with the Risk Management Framework (RMF), implement security controls, document security measures, oversee the security posture of information systems operating under Interim Authorization to Test (IATT), preparing authorization packages, and working with various stakeholders to ensure the system's security.
• Collaborate with System Administrators to ensure security configurations, patches, and access controls are implemented and maintained during testing.
• Develop requirements for large-scale or service specific pilot projects.
• Support (prepare, review, and present) the Program Office's DoD Acquisition process in the development of the Objective Quality Evidence (OQE) (i.e. Cyber Security Strategy, GAO responses, Clinger Cohen Act, Cyber Test & Evaluation Strategy, etc.) for multiple programs, in compliance with SSP Regulations.
• Support the Program Office Technical Lead as needed identifying issues and action items, document OQE, and participating in ISSO discussions.
• Provide customer interactions with Program Offices and associated contractors/subcontractors. Customer interactions will be a combination of teleconferences and on-site meetings.
• Interface with the SSP Functional Authorizing Official (FAO, formerly AODR) Coordinate and collaborate with the stakeholders, including SSP representativ.es and contractors/subcontractors through assessments, subject matter expert input to proposals, technical interchange meetings, status teleconferences, email correspondence, and other meetings as required.
• Support development of technical presentations and provide comments on the technical content.
• Develop System Security Plans detailing the security controls implemented for each information system.
• Work with SSP programs to develop and maintain lifecycle plans.
• Oversee the application of Security Technical Implementation Guides (STIGs) and ensure vulnerability scans are completed in a timely manner.
• Evaluate performer deliverables and presentations.

Required Qualifications

• Bachelor of Science Degree in Cybersecurity, Computer Science, Computer Engineering or equivalent and 5+ years of relevant experience 5+ years of relevant experience
• CompTIA Security+ or equivalent certification
• Ability to collaborate with large and highly competent technical teams.
• Strategic high-level thinking
• Ability/experience with planning an initiative involving large-scale, networked systems.
• Must have an active US Government TS clearance.
• Please note US Citizenship is required to maintain a TS/SCI clearance.
• Willing and able to travel 40% or more.

Preferred Qualifications

• 10+ years of relevant experience
• Graduate degree in Cybersecurity,
• Certified Information Systems Security Professional (CISSP) certification,
• or Certified Information Security Manager (CISM) certification

Compensation Details

$110,000.00-$150,000.00 annually The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Equal Opportunity Statement

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.

Original Posting

Original Posting: 10/29/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

About Amentum

For more than 100 years, Amentum has tackled the world’s toughest challenges to deliver agile and steadfast solutions to the U.S. government and its allies. With more than 50,000 employees on all seven continents and in more than 60 countries, Amentum delivers a broad range of operational support services to meet the critical needs of our clients. Our headquarters are in Chantilly, VA. Find us online at https://www.amentum.com/