Spokane Engineering

Product development DesigN and Fabrication

Johnston engineering is the region’s best product development engineering company.  We design your product and numerically simulate how it will perform before parts are ever manufactured. Integrating design and analysis ensures the quickest product development cycle and least number of prototype iterations which saves our customers time and money.  We fabricate and deliver your product in a timely manner and at a competitive price. 

We serve a broad range of clients in the biomedical, consumer product, pumped fluid systems, HVAC, thermal management, manufacturing, food handling equipment, firearms and energy storage fields.

We handle all phases of the design cycle from concept to product realization through the design of machined, welded, brazed, bonded, extruded and injection molded components. 

Our core analysis competencies include system engineering of fluid flow systems, thermodynamics, heat transfer, and component and assembly structural analysis using the latest Finite Element Analysis and Computational Fluid Dynamics design packages.

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Engineering Design and Fabrication Services

Engineering design services
Engineering Design Services
  • Design of parts, assemblies and systems
  • Conceptual design, prototyping, Design for Manufacturing
  • Machined, welded, brazed, bonded, fastened, extruded and injection molded components
  • Heat transfer equipment, manufacturing stations, industrial automation
  • 3D CAD modeling and making of engineering drawings
  • Partnerships with electrical engineering firms for design of complete electro-mechanical systems
Engineered Systems Fabrication and Testing
Engineered Systems Fabrication and Testing
  • Part procurement and inspection through strategic relationships with machine and fabrication shops

  • Subsystem and component assembly

  • Part, assembly, and system acceptance and characterization testing

Mechanical Engineering Analysis Services
  • Thermal and stress analysis with Finite Element Analysis (FEA) capabilities
  • Fluid flow and pressure drop modeling with Computational Fluid Dynamics (CFD) capabilities
  • Thermal performance modeling
  • Two-phase thermal management of evaporating and condensing systems
project management
Project Management and Project Engineering
  • Project management and coordination of technical team

  • Project schedule and budget implementation and maintenance

Recent Engineering Projects


13 Coins Restaurant

13 Coins 13 Coins is a timeless Seattle institution where generations have settled in for an unforgettable experience since 1967. Famed for its high backed booths, swiveling captain’s chairs and an …
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Stop Box

Johnston Engineering assumed the responsibility of handling the complete full design of parts, assembly and structural analysis. Working with and vetting out various vendors, Johnston Engineering was …
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Dew Point

Johnston Engineering has had the privilege to work with Dew Point. Dew Point provides a cost-effective, sustainable and eco-friendly solution to the world’s growing water shortage. Dew Point takes p…
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Recent publications, awards, and events

Best Engineering Firm Spokane

Best engineering firm in spokane

We are excited and proud to earn Bronze for “Best Engineering Firm” in the Spokane Coeur d’Alene Living Magazine Best in B2B awards. Perhaps the best part is that we don’t even com…
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120 North Stevens Ave Suite 200 
Spokane, WA 99201


Phone: 509.290.1034