About
Our customers want to build new products, devices and machines but need help in the research, design, and test stages, so we provide detailed engineering design, analysis, and fabrication services so when our customers get their products to market, they know they will work successfully.
About Us
ANALYSIS DRIVEN DESIGN
At Johnston Engineering, we value:
- INTEGRITY: We will be honest in all circumstances and ethical in our design and business practice.
- EXCELLENCE in work: We will always give our best effort, design, and attitude.
- Continual IMPROVEMENT: We will always seek to improve our knowledge, services, products, processes and develop our expertise.
We exist to: Reduce risk so your project is technically successful.
Allow you to leverage your time and magnify your team.
What we do: Design + Analysis + Build + Test
Project Management: Manage the project from start to finish, or help with a small piece to drive project success. Work alongside clients‘ existing teams of electrical, chemical & software engineers, scientists and researchers.
Andy Johnston, P.E. is the principal mechanical engineer of Johnston Engineering. He is a licensed Professional Engineer in Washington State with over 20 years of product development and mechanical engineering design and analysis expertise. Andy is also an instructor of mechanical engineering at Gonzaga University and a member of the Evergreen Bioscience Innovation Cluster.
Andy is regarded as a subject-matter expert in thermal management, including two-phase flow and heat transfer with extensive experience in the analysis of single and two-phase flow (boiling and condensing) in microchannel cold plates and heat exchangers, fluid conveyance and HVAC.
At Johnston Engineering, we are are passionate about solutions. We have designed products, devices, components, and machines for a wide range of industries including biotechnology, energy storage, renewable energy, carbon capture, consumer products, military and aerospace electronics cooling, nuclear, medical and sports equipment, and food handling equipment.
Our clients want to build new products, devices and machines but need help in the research, design, and test stages.
We provide detailed engineering design, analysis, and fabrication services so when our customers get their products to market, they know they will work successfully.
Publications & Interviews
Spokane Business Talks
Ignite Northwest Interview
Our Services

We can help you through all stages of the product development cycle from napkin sketch to high volume manufacturing.
Johnston engineering is the region’s only product development engineering firm with true integrated engineering design, analysis, and fabrication. Our approach of integrated design and analysis ensures the quickest product development cycle with the least number of prototype iterations which saves our customers time and money. We design, fabricate, and deliver your product in a timely manner and at a competitive price.
Johnston Engineering has over 40 years of combined experience in the following service areas:
- Product Development
- Prototype Fabrication
- Engineering Design
- Thermal Analysis
- Structural Analysis
- Computational Fluid Dynamics
- Custom Part Fabrication
- Product Testing & Validation
- Research Commercialization
- Manufacturing Support
We have designed products for a variety of industries including the following:
- Aerospace
- Pharmaceutical
- Military
- Medical device
- Food and beverage
- Firearms safety and hunting
- Electrical power generation and distribution
- Consumer products
- Recreational products
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