Position Summary
Mainstream Engineering is seeking a highly motivated Manufacturing Engineering Intern for Summer 2026. This position offers hands-on experience supporting the transition of innovative thermal control and energy conversion technologies from R&D into production.
The selected candidate will work directly with experienced manufacturing and design engineers to support production processes improve manufacturability and assist with process documentation and testing. Projects support a diverse portfolio of programs for U.S. government agencies including the Department of Defense (DoD) Department of Energy (DOE) Department of Transportation (DOT) as well as commercial clients.
This internship provides real-world exposure to manufacturing operations in a fast-paced deadline-driven environment. Interns will gain experience in process development fixture design production troubleshooting data analysis quality support and continuous improvement initiatives.
Key Responsibilities
Assist in developing and improving manufacturing processes and work instructions
Support process validation production builds and troubleshooting efforts
Design or modify fixtures tooling and test setups to improve efficiency and quality
Collaborate with R&D quality and production teams to enhance product manufacturability
Conduct time studies collect production data and support continuous improvement initiatives
Participate in technical documentation and proposal support as needed
Position Requirements
Currently enrolled in an ABET-accredited Mechanical Engineering program
Minimum cumulative GPA of 3.3 across all completed degrees
Graduate-level candidates preferred
Experience with 3D CAD software
Working knowledge of GD&T
Prior manufacturing or engineering internship experience preferred
Strong mechanical aptitude and comfort using hand tools and basic shop equipment
Interest in manufacturing engineering and process development within a production environment
Mainstream Engineering Corporation is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.
Required Experience:
Intern
Mainstream’s core purpose is to research, develop, and manufacture the most exemplary thermal control and energy conversion products globally