Mechanical Design Engineer - Secret Clearance

Immediately Hiring Mechanical Design Engineers!

Shape the future of innovation as we tackle cutting-edge projects that make a difference.  We’re not just in the business of engineering—we’re building a brighter future. Driven by creativity and a culture of excellence, we believe in the power of engineering to solve today’s challenges and create opportunities for tomorrow. What we do matters. 

We’re hiring Mechanical Design Engineers to design and develop test systems, mechanical assemblies, and hardware fixtures supporting advanced aerospace and defense programs. In this role, you’ll use Creo (Pro/E) and other CAD tools to create designs used in environmental testing (vibration, thermal, RF, and electro-mechanical systems).

You’ll work closely with cross-functional teams to take designs from concept through integration, validation, and production support, making this a great opportunity for engineers early in their careers who want hands-on experience with real hardware and complex systems.

Location: Tucson. AZ
Clearance: U.S. Citizenship required; Secret clearance (active or obtainable) Strong preference for Active Clearance.

 Key Responsibilities

• Design and develop mechanical test systems, fixtures, and hardware assemblies


• Create and maintain 3D CAD models and drawings (Creo / ProE)


• Apply GD&T and tolerance analysis to ensure manufacturability and performance


• Support environmental testing systems (vibration, thermal, RF, electro-mechanical)


• Assist with system integration, validation, and production support


• Troubleshoot issues and recommend design improvements for reliability and performance


• Collaborate with electrical, systems, and manufacturing teams on hardware integration

 Required Qualifications

• Bachelor’s degree in Mechanical Engineering or related STEM field


• 2+ years of experience in mechanical design or engineering support


• Experience with 3D CAD tools (Creo / ProE preferred)


• Knowledge of GD&T and mechanical design principles


• Experience creating mechanical drawing packages


• U.S. Citizenship required; ability to obtain a Secret security clearance

Preferred Qualifications

• Experience with mechanical and electronic packaging


• Familiarity with configuration management tools (Windchill, cPDM)


• Exposure to thermal or structural analysis


• Experience with environmental testing (vibration, shock, thermal)


• Background in aerospace, defense, or high-reliability systems


• Experience with model-based design or systems engineering concepts

The QDSS Advantage:  

At QDSS our advantage is purpose-driven work, collaborative teams, and complex challenges that push boundaries and build lasting impact. You’ll grow your career while contributing to mission-critical programs that demand excellence and shape the future. 

What You’ll Find Here :

• Work That Matters – Next-generation, safety- and mission-critical projects where your contributions have real-world impact. 

• Growth That’s Supported – Competitive compensation, employer-matched 401(k), certification assistance, and clear opportunities for advancement. 

• A Culture That Works – A flexible, collaborative, and people-first environment where teamwork, innovation, and balance are valued. 

• Benefits Include 

• Competitive pay, comprehensive medical/dental/life and disability coverage, 401(k) with employer match, professional development support, and a flexible, friendly workplace. 

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.