Mechanical Design Engineer – Test Systems

Shape the future of aerospace and defense technology by helping develop the test systems that ensure mission-critical products perform when it matters most. At Quest Defense Systems & Solutions, we partner with industry leaders to solve complex engineering challenges, bringing together innovative thinking and technical expertise to deliver solutions that make a real-world impact. We are seeking Mechanical Engineers to support the design, development, integration, and validation of advanced test environment systems used to verify and qualify sophisticated aerospace and defense products. In this role, you will work on complex mechanical test solutions involving vibration, thermal, hydraulic, radio frequency, and electro-optical systems, helping ensure the reliability, performance, and quality of cutting-edge technologies throughout production and development. Location: Tucson, AZ (Onsite) Relocation Assistance Available U.S. Citizenship Required Secret Clearance Active or Eligible Key Responsibilities Design and develop mechanical test equipment and test environments used to support the validation and production of aerospace and defense products. Create 3D CAD models, assemblies, engineering drawings, and documentation using Creo Parametric and related design tools. Perform mechanical design activities including component selection, tolerance analysis, packaging, and design for manufacturability. Support the integration, troubleshooting, and validation of test systems to ensure compliance with performance, accuracy, and reliability requirements. Collaborate with cross-functional engineering teams including electrical, systems, manufacturing, and test engineers to develop integrated test solutions. Evaluate existing production test equipment and recommend design improvements to enhance performance, reliability, and maintainability. Develop and maintain technical documentation, drawing packages, and configuration-controlled design artifacts. Participate in design reviews and provide technical input throughout the product development lifecycle. Support environmental testing activities involving vibration, thermal, shock, and other qualification requirements. Assist with root cause investigations and corrective actions related to test equipment or production support issues. Required Qualifications Bachelor's degree in Mechanical Engineering or another STEM-related discipline and a minimum of two (2) years of relevant engineering experience, or an advanced degree in a related field. Two (2) or more years of experience in mechanical design, product development, test equipment design, and/or production support engineering. Experience using CAD solid modeling and engineering analysis tools, with an emphasis on Creo Parametric (Pro/ENGINEER). Working knowledge of Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack-up analysis. Experience creating and maintaining mechanical drawings, assemblies, and engineering documentation. Ability to work effectively in a collaborative, cross-functional engineering environment. Strong problem-solving, troubleshooting, and technical communication skills. Ability to obtain and maintain a Secret Security Clearance (U.S. Citizenship required) Preferred Qualifications Active Clearance Experience designing mechanical systems for aerospace, defense, or other highly regulated industries. Experience with mechanical and electronic packaging design, including integration of electrical and mechanical components. Experience creating and maintaining complex engineering drawing packages and large assemblies. Familiarity with configuration management processes and tools such as Windchill, cPDM, or similar PLM systems. Experience working within Model-Based Engineering (MBE) or Model-Based Design (MBD) environments. Knowledge of mechanical subsystem development, including materials selection, thermal analysis, structural analysis, and control system integration. Experience supporting environmental qualification testing, including vibration, shock, thermal, and environmental stress screening (ESS). Exposure to systems engineering principles and requirements-driven development processes. Experience supporting products from concept through integration, testing, manufacturing, and production support. Why Join Us? Work on advanced aerospace and defense technologies Solve challenging technical problems in a highly collaborative environment Be part of a team where your contributions directly impact product success Gain exposure to complex electronic systems and cross-functional engineering teams Relocation assistance available Opportunity to support meaningful, mission-critical programs Full compensation package is based on candidate experience and certifications Pay Ranges $62 — $67 USD At Quest Defense Systems and Solutions , we don’t just build technology — we engineer the future. From next-generation aerospace solutions to cutting-edge defense systems, we tackle the toughest, mission-critical challenges that keep people safe and push the boundaries of innovation. This is where problem-solvers, innovators, and visionary thinkers come together to shape the future. With over 25 years of aerospace and defense engineering expertise, our commitment to delivering high-quality, transformative solutions sets us apart — not just as an industry leader, but as a driving force for impactful change. Together, we’re not just leading the industry — we’re revolutionizing it. Quest Defense provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.