Mechanical Engineer

Description Leidos is seeking a talented Mid‑Level Mechanical Engineer to join our Security Enterprise Solutions (SES) business unit in Vista, CA. Our team designs and manufactures highly complex security equipment deployed at border crossings, airports, seaports, and other transportation hubs. Our product portfolio includes radiation detectors and spectrometers, X‑ray and gamma‑ray scanners for cars, trucks, and trains, and CT explosives detection systems for airline passenger baggage. In this role, you will update existing designs and introduce innovative products to our extensive line of security detection solutions. The products developed through this effort are truly novel and will make global travel and trade safer, healthier, and more efficient. Primary Responsibilities Design and develop mechanical structures for large and small electromechanical systems and sub‑systems Identify components, communicate with vendors, and provide analytical recommendations for component selection Plan and design mechanical structures, environmental enclosures, tools, machines, and other mechanically functioning equipment Oversee the installation, operation, maintenance, and repair of equipment, including non‑intrusive X‑ray inspection systems Communicate effectively with internal team members across multiple engineering disciplines Contribute expertise to the product development team for key component design requirements Lead preliminary and critical design reviews for subsystems throughout the product development process Collaborate with a multidisciplinary team of scientists and engineers to develop proof‑of‑concept, prototype, and production‑ready systems Create and maintain specifications, ensuring all documents are well‑developed, accurate, and consistent Adhere to established Leidos internal processes and practices Basic Qualifications Bachelor’s degree with 5+ years of relevant experience, or a Master’s degree with 4+ years of relevant experience; additional work experience may be considered in lieu of a degree Hands‑on experience defining and implementing formal design documentation, including assembly and detail drawings, Bills of Materials (BOMs), and 3D CAD modeling Strong presentation skills Excellent documentation and process discipline with close attention to detail Proficiency in SolidWorks for part, assembly, and mechanical drawing designs Proficiency in Microsoft Office Suite (Word, PowerPoint, Excel, and Outlook) Exceptional analytical, technical, and problem‑solving skills Solid understanding of Engineering Mechanics (Statics and Dynamics) and Heat Transfer Ability to organize and prioritize tasks based on guidance from the engineering manager Ability to pass a TSA and CBP suitability background check Willingness to travel internationally, as required (typically up to 10%) Desired Qualifications Familiarity with the Engineering Change Order process (ECR, ECO, ECN) Experience performing Finite Element Analysis (FEA) Knowledge of materials and material properties associated with outdoor platforms and electronic enclosures Strong understanding of metal fabrication processes, including machining, sheet metal fabrication, and welding Experience with corrosion protection techniques and material finishing processes Ability to effectively apply Geometric Dimensioning and Tolerancing (GD&T) per ANSI Y14.5 Experience with X‑ray device shielding and collimation is a plus Pay Range: $87,100.00 - $157,450.00 Pay and benefits are fundamental to any career decision. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. Original Posting: April 13, 2026 #J-18808-Ljbffr Leidos Inc