Information Systems Security Engineer 3 - TS/SCI With Poly

Purpose and Impact Amentum is seeking an Information Systems Security Engineer (ISSE) 3 for a prime contract that is based out of our Columbia, MD office.

Essential Responsibilities Participate as the primary security engineering representative on engineering teams for the design, development, implementation, evaluation, and/or integration of secure networking, computing, and enclave environments.

Apply knowledge of Cybersecurity policy, procedures, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.

Interact with the customer and other project team members.

Participate as the primary security engineering representative on engineering teams for the design, development, implementation, evaluation, and/or integration of Cybersecurity architectures, systems, or system components.

Support the Government in the enforcement of the design and implementation of trusted relationships among external systems and architectures.

Support security planning, assessment, risk analysis, and risk management.

Identify overall security requirements for the proper handling of Government data.

Provide security planning, assessment, risk analysis, and risk management.

Perform system or network designs that encompass multiple enclaves to include those with differing data protection and classification requirements.

Recommend system-level solutions to resolve security requirements.

Minimum Requirements Knowledge, Skills, and Abilities Twenty (20) years of experience as an ISSE on programs and contracts of similar scope, type, and complexity to include recent experience within the last five (5) years with Cybersecurity principles and technology, including access control, authorization, identification, and authentication, PKI, network, and enterprise security architecture is required.

A Bachelors degree in Computer Science, Information Assurance, Information Security, System Engineering, or related discipline from an accredited college or university is required.

A Masters degree in Computer Science, Information Assurance, Information Security, System Engineering, or related discipline may be substituted for two (2) years of experience, reducing the requirement to eighteen (18) years of experience.

In lieu of a Bachelors degree, four (4) additional years of ISSE experience may be substituted.

Clearance Required TSSCI Poly Minimum Education A Bachelors degree in Computer Science, Information Assurance, Information Security, System Engineering, or related discipline from an accredited college or university is required.

A Masters degree in Computer Science, Information Assurance, Information Security, System Engineering, or related discipline may be substituted for two (2) years of experience, reducing the requirement to eighteen (18) years of experience.

In lieu of a Bachelors degree, four (4) additional years of ISSE experience may be substituted.

Minimum Years of Experience Twenty (20) years of experience as an ISSE on programs and contracts of similar scope, type, and complexity to include recent experience within the last five (5) years with Cybersecurity principles and technology, including access control, authorization, identification, and authentication, PKI, network, and enterprise security architecture is required.

In lieu of a Bachelors degree, four (4) additional years of ISSE experience may be substituted for a total of twenty-four (24) years of experience.

Required Certifications DoD 8570 compliance with IASAE Level 3 is required.

Compensation Details $220,000 - $270,000

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 401k 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-OHara Service Contract Act (SCA), or other employment contracts may include different provisions and benefits.

Original Posting February 18, 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.

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