Test Engineer

The Sensor Systems Analysis and Engineering Portfolio at Leidos is seeking a highly motivated Test Engineer to join our dynamic team in the development of cutting-edge EO/IR sensor systems. This role is critical in supporting the mechanical design, integration, and testing of advanced mechanical and optomechanical systems that enhance our capabilities in defense and aerospace applications. The Test Engineer will have a strong background in mechanical engineering principles and a passion for innovative technology along with interest or exposure to development or integration of electro-optical technology.

Our program focuses on the development of state-of-the-art EO/IR sensor systems that are integral to modern defense solutions. These systems are designed to provide enhanced target detection and tracking capabilities, ensuring superior performance in various operational environments. As part of our team, the Test Engineer will contribute to the advancement of technologies that protect and serve and work alongside a skilled team of Engineers, Scientists, and Software Developers to design and develop new and existing solutions to support future fielded systems.

Primary Responsibilities:

• Design, develop, and test mechanical components and assemblies for EO/IR sensor system applications.

• Collaborate with cross-functional teams to integrate mechanical hardware with optical and electronic solutions.

• Conduct system-level testing and validation to ensure compliance with mechanical performance specifications and environmental requirements.

• Analyze and troubleshoot mechanical issues, including thermal management, structural integrity, and alignment, providing timely solutions to enhance system reliability.

• Document design processes, test results, and technical specifications for project records.

• Participate in design reviews and contribute to continuous improvement initiatives.

Basic Qualifications:

• Bachelor's degree in Mechanical Engineering or a related field.

• 0+ years of experience in mechanical system design, development, and testing.

• Proficiency in CAD software (e.g., SolidWorks, CREO, AutoCAD) and FEA tools.

• Strong understanding of mechanical components and systems, including optomechanical assemblies, thermal management, and structural design.

• Strong problem-solving skills and attention to detail.

• Must be a resident or willing to relocate to the Huntsville, AL area.

• Ability to obtain and maintain a Secret Security Clearance or possess and maintain a Final Secret Security Clearance.

• U.S. citizenship is required.

Preferred Qualifications:

• Experience with optomechanical design and precision alignment techniques.

• Experience with thermal analysis and vibration testing.

• Knowledge of materials selection, manufacturing processes, and tolerance analysis.

• Familiarity with military standards and regulations related to defense systems (e.g., MIL-STD-810 for environmental testing).

• Familiarity with Ubuntu or other Linux-based operating systems.

• Strong communication skills and ability to work effectively in a team environment.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

July 30, 2026

Pay Range:

Pay Range $57,850.00 - $104,575.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.