Senior Mechanical Engineer - Gaseous Components
Quantum Fuel Systems LLC · Lake Forest, California, United States · On-site
Pay: USD 120,000 – 140,000 a year
Posted Aug 11, 2026
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Senior Mechanical Engineer
Quantum Fuel Systems / www.qtww.com
Reports to: Senior Vice President, Product Engineering
Location: Lake Forest, CA (onsite at company headquarters)
Employment type: Full-time
FLSA: Exempt
Pay Range: $120,000.00 - $140,000.00/year
Quantum Fuel Systems is engineering the future of alternative fuel solutions. For over 25 years, we've been at the forefront of clean energy innovation, designing, developing, and delivering industry-leading storage systems and transport trailers for compressed natural gas (CNG), renewable natural gas (RNG), and hydrogen.
Based in Lake Forest, California , we're driving clean energy forward by helping our partners meet ambitious net-zero targets with safe, reliable, and sustainable solutions. Our product line includes next-generation fuel storage systems for commercial vehicles and virtual pipeline trailers that offer industry-leading capacity with advanced composite technology.
We are seeking a talented and innovative Sr. Mechanical Engineer / Fuel Systems Engineering to join our team. This role will be pivotal in the development of new products, improvement of existing designs, and support of system design activities. The ideal candidate will have a strong background in mechanical engineering, experience with alternative fuel systems or related industries, and a passion for creating cutting-edge solutions that advance safety and performance in the alternative fuel sector and gas transportation. Additionally, this role will involve preparing specifications for hydrogen and CNG vehicle and transportation components and working with internal and external customers to design and configure components for various applications. Design, develop, test, and integrate high-pressure gaseous fuel components and systems for CNG and Hydrogen automotive, truck, and virtual pipeline applications.
Requirements
Lead high-pressure component and system designs.
Generate and support design activities: DFMEA, ADVP&R, etc.
Evaluate, select, and qualify supplier products and services.
Outline and oversee or perform product verification and validation testing.
Support field services and failure root cause analyses.
Knowledge of material compatibility issues with hydrogen and natural gas.
Ability to apply a systematic and logical approach to engineering and design processes.
Perform analytic calculations, e.g., load and flow calculations.
Provide technical support and expertise to internal (e.g. operations, manufacturing, sales, service) and external customers.
Good communication skills, both verbal and written.
Strong documentation skills; test procedures, test reports, etc.
Lead and mentor Junior Mechanical Engineers.
Stay current with industry trends, emerging technologies, and best practices to drive continuous improvement and innovation in design processes.
Adopt and implement Quantum's Quality Assurance Procedures-QAP and Departmental Work Instructions-DWI.
Education and…