
At Mainstream Engineering, our engineers turn innovative ideas into real-world products that solve complex technical challenges. We are seeking a Mechanical Design Engineer who thrives in a hands-on development environment and enjoys taking concepts from prototype through production.
In this role, you'll collaborate with multidisciplinary engineering teams to design, document, and refine cutting-edge products across a wide range of applications. If you enjoy fast-paced engineering work, detailed mechanical design, and seeing your work become reality, we want to hear from you.
Why Mainstream Engineering?
At Mainstream Engineering, you won't be siloed into a narrow role. Our engineers work on meaningful projects, collaborate directly with experienced technical teams, and contribute to products from concept through commercialization. You'll have the opportunity to work in an environment that values innovation, problem-solving, and hands-on engineering.
Mainstream Engineering Corporation is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.

Mainstream Engineering Corporation is a solutions-oriented research, development and manufacturing small business founded in 1986. Our Engineering Mission is to research and develop emerging technologies and to engineer these technologies into superior-quality, military- and private-sector products that provide a technological advantage.
Areas of expertise include thermal control, energy conversion, turbo-machinery, chemical-based technologies and materials science.
Mainstream began as a thermal-science R&D company solving NASA and DOD problems related to thermal control, replacement working fluids and advanced heat pump development. Today, while continuing to perform these R&D projects for NASA, DOD, DOE, USDA, DOT and DOC (NIST) applications, we have found a tremendous need for rapid, cost-effective engineering solutions in the commercial world. Mainstream has in-house facilities to transition an innovation from its initial laboratory proof-of-concept demonstration to production.