Mechanical Design Engineer 3

Senior Mechanical Engineer 3 – Test Equipment Location: Tucson, AZWork Arrangement: OnsiteEmployment Type: Full-Time Contract with Legion Technical SolutionsIndustry: Aerospace & DefenseClearance: Active U.S. Secret Security Clearance RequiredDesign the Test Systems Behind Advanced Defense TechnologyLegion Technical Solutions is seeking a Senior Mechanical Engineer – Test Equipment to support one of the nation's premier aerospace and defense technology organizations.This role is ideal for a mechanical engineer who enjoys taking complex test equipment from concept through detailed design, integration, validation, and production support. You'll develop mechanical solutions used to test sophisticated defense systems across demanding vibration, thermal, hydraulic, RF, and electro-optical environments.What You'll Be DoingAs part of an experienced engineering team, you'll help design, develop, document, and maintain advanced mechanical test systems.Key responsibilities include:* Design mechanical systems, fixtures, and components for advanced production test equipment.* Develop detailed 3D CAD models and engineering drawings using ProE / CREO Parametric.* Apply Geometric Dimensioning & Tolerancing (GD&T) and tolerance analysis to ensure manufacturability, fit, and performance.* Develop innovative mechanical solutions for vibration, thermal, hydraulic, RF, and electro-optical test environments.* Support test equipment integration, troubleshooting, verification, and validation.* Ensure designs meet stringent performance, reliability, and production requirements.* Develop and maintain engineering documentation and configuration-controlled design data.* Collaborate with electrical, systems, software, manufacturing, and test engineers throughout the development lifecycle.* Support existing test equipment while contributing to new test system development.What We're Looking ForStrong candidates will bring:* 3–5 years of relevant Mechanical Engineering experience.* Experience designing mechanical systems, test equipment, fixtures, or related hardware.* Strong 3D CAD design and modeling experience, preferably ProE / CREO Parametric.* Knowledge of GD&T and tolerance analysis.* Experience developing and maintaining engineering drawings and technical documentation.* Understanding of configuration management and controlled engineering environments.* Ability to work effectively within multidisciplinary engineering teams.* Bachelor's degree in Mechanical Engineering or a related STEM discipline.* Active U.S. Government Secret security clearance is required for consideration.Experience with aerospace/defense products, production test equipment, environmental testing, or highly regulated engineering environments will be particularly valuable.Why This Opportunity?This position provides the opportunity to work at the intersection of mechanical engineering and advanced test technology. Rather than focusing exclusively on product design, you'll develop the specialized equipment required to prove that sophisticated defense systems perform reliably under demanding real-world conditions.You'll work alongside experienced engineers while contributing directly to the successful production and delivery of mission-critical technology.About Legion Technical SolutionsLegion Technical Solutions (LTS) is a specialized technical staffing and workforce solutions company supporting organizations across aerospace, defense, intelligence, engineering, and advanced technology. As the contract employer, LTS provides the employment relationship and ongoing support while you work directly alongside our client's engineering organization.About Our Client – ConfidentialOur client is a globally recognized aerospace and defense technology organization developing sophisticated systems that support the United States and its allies. Its engineering teams solve complex challenges across advanced sensing, integrated defense, communications, and other mission-critical technologies.This opportunity provides the chance to work within a highly accomplished engineering organization while contributing to technologies with direct national security impact.Equal Opportunity EmployerLegion Technical Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, veteran status, or any other characteristic protected by applicable law.