Journeyman Software Developer - Travel with Security Clearance

Amentum is seeking a Software Engineer to join our U.S. Marine Corps advanced technology development team supporting complex weapon system software development. This position supports research and development efforts focused on developing, optimizing, testing, and maintaining software in a fast-paced R&D environment. The Software Engineer will support the development of high-performance software, improve existing code for speed and efficiency, and assist with test bench and testing activities. The primary work location is Dahlgren, Virginia, with approximately 50% weekday travel, primarily to locations along the East Coast.

Software Engineer Responsibilities Include

• Create software and correct defects using an Agile development process throughout the software development lifecycle.
• Develop, maintain, and optimize software supporting complex weapon system components.
• Measure and analyze computer processing time and resource usage and develop improved methods for disk-space utilization, network loading, and throughput.
• Design, code, and maintain software support tools and models.
• Support test bench and testing activities within an R&D environment.
• Apply comprehensive knowledge of software requirements, design, coding, benchmark testing, debugging, architecture, and documentation.
• Plan, perform, and support software design, coding, and testing activities.
• Collaborate with technical teams on development projects and provide software engineering progress to R&D leadership.
• Work effectively in a collaborative development environment and communicate technical information with team members and stakeholders.

Minimum Requirements

• Bachelor's degree in Computer Science, Mathematics, Engineering, or a related field and 4 years of experience; OR a Master's degree in Computer Science, Mathematics, Engineering, or a related field and 2 years of experience.
• Two (2) years of program/project-level experience in software design and development.
• Two (2) years of experience performing detailed and complex software design and development meeting sub-millisecond timing requirements.
• Experience working within an Agile software development environment and methodologies.
• Must be able to obtain/maintain a Secret security clearance. (At a minimum, must receive/be approved for an Interim Secret security clearance in order to start.) Note: U.S. citizenship is required to obtain a Secret clearance.

Preferred Qualifications

• Three (3) or more years of C++ experience.

Compensation Details

$90,000-$140,000 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

09/16/2026 - 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 .