Cybersecurity Engineer

Amentum is seeking a Cybersecurity Engineer to support proactive cyber activities for NASA deep space exploration. In this onsite Houston, TX role, you will help protect spacecraft systems by assessing threats and vulnerabilities across Flight Software and embedded hardware architectures.

The position focuses on hands-on security testing and collaboration with development teams to improve cyber resilience for spaceflight architectures spanning flight, link, and ground segments.

Responsibilities

• Lead security testing, threat modeling, and vulnerability assessments for Flight Software (FSW) and embedded spacecraft hardware.
• Conduct security evaluations to identify and mitigate security weaknesses.
• Research advanced spacecraft vulnerabilities and emerging cyber threats affecting spaceflight architectures and embedded systems.
• Execute non-disruptive penetration testing and red-teaming campaigns across the Space Segment (flight software, RTOS, on-board buses), Link Segment (RF telemetry, CCSDS protocols), and Ground Segment (mission control).
• Perform deep-dive “bounty hunting” and vulnerability analysis on third-party software, open-source repositories, and embedded microcode used in safety-critical systems.
• Plan and carry out interactive Red Team versus Blue Team exercises to validate defensive capabilities and strengthen cyber resilience.
• Collaborate with software, systems, and integration teams to incorporate cybersecurity best practices across the development lifecycle.
• Document findings, provide risk-based recommendations, and support remediation and mitigation activities.
• Perform other duties as assigned.

Requirements

• Typically requires a bachelor’s degree in Engineering and a minimum of 2 to 5 years of experience in the field or a related area.
• Bachelor’s degree in Engineering, Cybersecurity, or Cyber Operations.
• Experience performing security testing on software, firmware, embedded systems, or mission-critical platforms.
• Experience conducting threat modeling and risk assessments for complex systems.
• Experience performing vulnerability assessments on critical software and hardware systems.
• Experience with embedded software penetration testing, red teaming, or vulnerability research applied directly to aerospace or critical infrastructure platforms.
• Demonstrated ability writing custom testing scripts and low-level code targeting resource-constrained environments (C/C++, Python, Assembly).
• Strong analytical and problem-solving skills.
• Excellent verbal and written communication skills, including the ability to communicate technical findings to technical and non-technical audiences.
• Ability to obtain and maintain a Top Secret security clearance.

Technologies

• Flight Software (FSW)
• RTOS
• RF telemetry
• CCSDS protocols
• C/C++
• Python
• Assembly
• Open-source repositories
• Embedded microcode

Benefits

• 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

Requisition Preferences

• Experience with spacecraft, satellite, aerospace, defense, or other safety-critical systems.
• Experience with Flight Software (FSW) development, testing, or security assessments.
• Knowledge of secure software development practices and DevSecOps methodologies.
• Ability to work effectively in a cross-functional engineering environment and support multiple projects simultaneously.

Work Environment

Generally an office environment, with tasks that may include inside or outside work depending on assigned activities.

Physical Requirements

• Work may involve sitting or standing for extended periods (90% of time).
• May require lifting and carrying up to 25 lbs. (5% of time).

Equipment and Machines

• Standard office equipment (PC, telephone, printer, etc.).

Attendance

Regular attendance in accordance with the established work schedule is critical. Ability to work outside normal schedule and adjust to meet peak periods and surge requirements.

Other Essential Functions

Professional behavior that enhances productivity and promotes teamwork and cooperation. Grooming and dress must be appropriate for the position and must not impose a safety risk or hazard to the employee or others.

Additional Job Requirements (Citizenship/Background Investigation)

• Proof of U.S. Citizenship or U.S. Permanent Residency may be a requirement.
• Must be able to complete a U.S. government background investigation.

Compensation

Salary starts at $83,700 per year. Final pay will be commensurate with the candidate’s experience, skills, and qualifications.

Position Details

• Location: Houston, TX (onsite)
• Experience: Minimum 2 years
• Education: Bachelor’s degree in Engineering, Cybersecurity, or Cyber Operations
• Requisition posting date: 09/21/2026 - Until Filled
• Closing timeline: Amentum anticipates the requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting (timeline may change based on business needs).