Expert Security Engineer

As the Information System Security Officer (ISSO) for GEODS, you will directly contribute to the success of critical mission systems by ensuring the confidentiality, integrity, and availability of sensitive information processed within the system. Your proactive management of the system's security posture, including rigorous risk assessments, vulnerability management, and security control implementation, enables IC members to securely access and utilize our system within critical times. By maintaining compliance with relevant security policies and regulations (e.g., ICD 503, NIST 800-53), you will minimize potential security risks that could compromise operations, protect national security assets, and ultimately enhance the effectiveness of the efforts to protect the nation. Your work facilitates the timely and secure delivery of vital information to decision-makers, empowering them to make informed choices and safeguard national interests.

Responsibilities:

• Bridge the gap between high-level security policies/requirements and technical/operational implementation of those requirements.
• Apply Risk Management Framework (RMF) security controls in accordance with regulatory policies into formal system test plans.
• Serve as the security subject matter expert (SME) and will manage the execution of systems security activities for multiple applications.
• Provide guidance to teams on the A&A Process to include related security documentation such as systems concept of operations (ConOps), system security design, implementation plans, operational procedures, and maintenance training materials.
• Provide support to development teams for mitigation and management of Plan of action and Milestones (POA&Ms)
• Conducts assessments of existing IT architecture for compliance with security requirements in accordance with regulatory security frameworks (IAW NIST SP 800-53 Rev. 4)
• Provide engineering support and assistance to authorization/accreditation test and evaluation activities
• Conduct IT Disaster Recovery exercises and maintain all associated documentation
• Management of software in use and updates as required
• Evaluate proposed security architectures and designs and provide input as to the adequacy of those security designs to meet required security compliance objectives
• Conduct and review security scans
• Track and mitigate customer system vulnerabilities
• Participate in IAVA Testing and provide recommendations of baseline acceptance of system patches
• Ensure STIG compliance and mitigation
• Ensure and maintain integration compliance with enterprise services
• Provide continuous monitoring support for information systems
• Assist with running vulnerability scans on various applications and provide recommendations for compliance
• Ability to work closely with leadership, engineers, admins, and developers to efficiently work through the A&A process and Continuous Monitoring.

Requirements:

• XACTA 360 experience
• Certified Information Systems Security Professional (CISSP), CompTIA CASP, or other IAT II Certification
• Extensive experience with Security Framework regulations, to include: NIST 800-53 Rev4; ICD 503; CNSS 1253; RMF
• Extensive experience with Plan of Action Milestones (POA&Ms) and knowledge of appropriate corrective action for unacceptable risks
• Experience with a variety of systems (e.g. desktop, cloud, etc.)
• Knowledge of Enterprise Security Best Practices (IAW NIST 800-53 Rev4; ICD 503; CNSS 1253; RMF)
• Applicable software/ hardware/management training & certification (e.g., specialties like Amazon Web Service architect/engineering, ServiceNow/Service+)

Clearance Required:

• TS/SCI with Poly

Minimum Education:

• Bachelor's degree plus 10 years’ experience, Associate’s degree plus 12 years’ experience, or a minimum of 14 years of experience, in a related field

Required Certifications:

• Certified Information Systems Security Professional (CISSP), CompTIA CASP, or other IAT II Certification

#javelin 

       

Compensation Details:

US:$175,000-$195,000

       

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

 

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

       

Original Posting:

01/13/2026 - 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.

       

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.