The Maritime System Division of Leidos is seeking a talented and motivated Mechanical Engineer to join our Long Beach, MS office. In this role you will play a pivotal role in designing, prototyping, and developing sophisticated electro-mechanical systems for defense applications. This is an onsite position where you will work with a cross-functional team of engineers, technicians, and program management to take concepts into fieldable systems.

Primary Responsibilities.

• Support and/or lead the design, development, installation, and maintenance of electro-mechanical systems.
• Utilize SolidWorks to create detailed 3D models, assemblies, and 2D engineering drawings.
• Perform fundamental structural, thermal, and tolerance analysis to ensure designs can meet and withstand environmental and operational requirements.
• Work with multidisciplinary engineering teams to ensure seamless hardware integration and design feasibility.
• Perform tasks to completion independently, be able to suggest solutions to technical problems, and serve on a design review team.
• Prepare and/or review proposed engineering change documents, test plans, and test reports.
• Work with production staff to ensure products are manufactured as designed and in a timely manner.
• Present designs and justify engineering decisions during engineering reviews both internally within the company and externally with customers and stakeholders.

Basic Qualifications.

• Bachelor’s degree in Mechanical Engineering or equivalent from an ABET-accredited engineering degree program 4+ years prior relevant experience or Master’s degree with 2+ years of prior experience.
• Requires deep understanding of and ability to apply principles, theories, and concepts of mechanical engineering.
• Proficiency with the SolidWorks software suite.
• Proficiency with Microsoft Office products such as Word, PowerPoint, and Excel.
• Strong problem solving and organizational skills, along with excellent written and oral communication skills.
• US Citizenship and the ability to obtain a DoD Secret Security Clearance.
• Average physical mobility to move around an office and lab environment.

Preferred Qualifications.

• Hands-on experience working on electro-mechanical assemblies.
• Prior experience with HVAC systems design and/or thermal management.
• Prior experience or knowledge with unmanned maritime vehicles and associated sensors.
• Prior experience with designing systems to operate long-term in high-corrosive environments.
• Prior experience with designing structures or enclosures subject to high shock, vibration, and extreme thermal environments.
• Experience using Finite Element Analysis Tools for structural and thermal modeling.
• Certified SolidWorks Associate (CSWA) or higher.
• Experience working in an ISO manufacturing environment.
• Experience working in PTC Windchill PLM.

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:

June 1, 2026

Pay Range:

Pay Range $87,100.00 - $157,450.00

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.