Mid Level Information System Security Officer (ISSO) (eMASS Specialist)

Purpose and Impact:

Are you interested in using your skills to help shape the Cyber, Security, & Intel space?  If so, look no further. Amentum is seeking an Information System Security Officer (ISSO)   to join our team of passionate individuals at Fort Meade, MD. In this role you will support challenging, mission-critical projects that make a direct impact on the Nation’s security and intelligence mission.

In support of DISA, Amentum’s Intel and Cyber Division is expanding a proven team of highly skilled engineers and architects to support a program that provides critical IT capabilities to the Department of Defense. This team is committed to engineering, assembling, integrating, deploying, and sustaining an innovative IT enterprise solution.

Our team delivers secure, mission-critical capabilities where system integrity and rapid deployment are paramount. We are seeking an Information System Security Officer (ISSO)   who combines meticulous technical discipline with strategic foresight. In this role, you will lead efforts to establish and maintain robust baselines in a rapidly evolving operational environment. Success requires the ability to navigate complex, unique technical challenges independently while fostering collaborative solutions across integrated teams. To excel, you must possess a proactive learning mindset and the agility to rapidly master and govern the integration of next-generation systems and services.

Work Schedule:  8 Hours per day, Monday thru Friday

Essential Responsibilities:

The duties and responsibilities of the Information System Security Officer (ISSO)   include but are not limited to the following:

The ISSO is responsible for the day-to-day security posture of assigned information systems that process, store, or transmit classified and sensitive intelligence information. The incumbent ensures systems are operated, maintained, and disposed of in compliance with Intelligence Community (IC) policy, the Risk Management Framework (RMF), and the system's authorization to operate (ATO). The ISSO is the primary on-site security point of contact for system owners, administrators, users, and the ISSM.

Key Responsibilities:

- Support all RMF steps (categorize, select, implement, assess, authorize, monitor) for assigned systems in accordance with ICD 503, NIST SP 800-37 and 800-53, and CNSSI 1253.

- Maintain accurate system records in the designated governance, risk, and compliance tool (e.g., eMASS or agency equivalent)
- Develop and maintain authorization packages, including the System Security Plan, security control implementation statements, Plan of Action and Milestones (POA&M), contingency plans, and configuration management plans.

- Coordinate with assessors and authorizing officials, and track the system through initial authorization, reauthorization, and continuous monitoring.

- Review vulnerability scan results, audit logs, and security configuration baselines (e.g., STIGs); coordinate remediation and track POA&M items to closure.

- Verify that patching, antivirus/endpoint protection, and configuration changes meet required timelines and baselines.

- Conduct periodic self-inspections and prepare for inspections, audits, and assessments by the agency inspector general, security office, and external oversight bodies.

- Ensure system changes undergo security impact analysis and configuration control board review before implementation.

- Detect, document, and report security incidents, spillages, and policy violations to the ISSM and the appropriate incident response and counterintelligence elements within required timeframes.

- Support containment, sanitization, and recovery actions following classified data spillage or suspected compromise.

- Assist insider threat and counterintelligence personnel with user activity monitoring and audit data requests, as authorized.

- Verify that users hold the appropriate clearance, formal access approvals, need-to-know, and signed user agreements before access is granted.

- Oversee privileged user accounts and enforce separation of duties and least privilege.

- Brief users on their security responsibilities and deliver annual and initial security awareness training.

- Enforce procedures for the control, marking, transfer, sanitization, and destruction of classified media and removable storage.
- Support cross-domain solution and data transfer processes in coordination with the responsible approval authority.

- Verify that systems are installed and operated in accredited spaces consistent with ICD 705 and the facility's accreditation.

- Advise system owners, program managers, and engineers on security requirements during design, acquisition, and development, including supply chain risk considerations.

- Participate in working groups, configuration control boards, and security reviews.

- Maintain current knowledge of IC and DoD policy, emerging threats, and technology changes affecting assigned systems.

Work Environment, Physical Demands, and Mental Demands:

- Employee will work in a SCIF on a daily basis.

- Employee may also be required to work in a datacenter environment for specified periods of time.

Minimum Requirements (Knowledge, Skills, and Abilities):

- Hands-on experience managing system records, controls, artifacts, and POA&Ms in eMASS.
- Experience supporting classified networks, cross-domain solutions, or multi-enclave environments.

- Familiarity with ACAS, STIG Viewer, SCAP, and Assured Compliance tools.

- Experience supporting ATO packages for cloud environments (e.g., C2S/commercial cloud for classified workloads).

- Familiarity with IC-specific tools and processes for reciprocity and enterprise authorization.

- Experience briefing AOs, program managers, and senior leadership.

- Strong understanding of security control families and how to interpret implementation, inheritance, and assessment procedures.

- Ability to translate technical findings into clear risk statements.

- Excellent written communication, with a strong attention to detail in documentation.

- Ability to manage multiple packages and competing deadlines.

- Sound judgment when handling classified and sensitive information.

- Ability to work independently and within cross-functional teams.
- Working knowledge of the RMF, NIST SP 800-37, 800-53, and 800-53A, CNSSI 1253, and ICD 503.
- Thorough knowledge of IC and national security information system policy, including CNSS issuances and agency directives.
- Skill in assessing risk and applying technical, operational, and management controls.
- Ability to translate policy into practical implementation guidance for system administrators.
- Ability to work independently, manage multiple systems and deadlines, and exercise sound judgment in handling classified information.

Security Clearance Required:

- Must have active Top Secret clearance with SCI eligibility

Minimum Education:

- Bachelor's degree in cybersecurity, information systems, computer science, or a related field, or equivalent experience (typically 2 additional years in lieu of a degree ) , or a related technical field. Additional experience may substitute for a degree or equivalent professional experience (typically 4 additional years in lieu of degree).

Minimum Years of Experience:

- Experience (typically 3–5 years for mid-level) in information assurance or cybersecurity in a classified environment
- Working knowledge of RMF, ICD 503, NIST SP 800-53, and CNSSI 1253.
- Experience with Windows and Linux hardening, vulnerability scanning, and log review.
- Ability to write clearly and brief technical and non-technical audiences.
- Experience on JWICS, SIPRNet, or other IC-specific networks, and with cross-domain solutions.

Required Certification: (One or more of the following)

- Security+ CE

Preferred Qualifications:

- Certified Information Systems Security Professional (CISSP)
- Certified Access Specialist (CASP)
- Certified Information Security Manager (CISM)
- Certified Information System Auditor (CISA)

#javelin

As part of our commitment to maintaining a safe and compliant work environment, Amentum is a drug-free workplace and requires all personnel to comply with company drug and alcohol policies as a condition of employment.  Employment is contingent upon successful completion of the drug screening process.  Please note that this may include pre-hire screening for marijuana, as well as other federally controlled substances due to Amentum’s role as a federal contractor and trusted partner to the US Government.

Other Responsibilities:

Safety - Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self-aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams.

Quality - Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities.

Procedure Compliance - Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.

Compensation Details:
$120,000 - $160,000

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:
11/04/2026 - 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 .