Family Owned and Community Driven
Allen Johansen established Johansen Mechanical, Inc in 1983 primarily as a sheet metal and HVAC construction company. The foundation of our success is long-term social connections within our customer base, communities, and employees.

After 35 years, Johansen Mechanical, Inc. has transitioned to a second-generation family owned and operated business that maintains the flatten structure set forth by Allen Johansen. Our company’s structure enables management to have a shortened distance to the frontline to effectively and efficiently deploy resources, which translates to a rapid response for our customers.

Our dedicated owners, Keith Johansen and Derek Holm, spend a considerable amount of time establishing and maintaining personal connections between our families and the communities we serve. As a result, we have a deep knowledge of our ever-changing industry, partners & suppliers, and most importantly . . . our Customers.

Maintaining consistent and conservative growth has allowed us to exceed the expectations of every customer from the largest general contractors in the US to the local homeowner.

Meet The Team

Keith Johansen

President, Owner

Derek Holm

Vice President, Owner

Debbie Juno

Financial Controller - AR/AP

Andy Leishman

Division Manager, Service

Michael McCoy, LEED GA

Division Manager, Energy & Controls

Stacie Steffy

Account Executive, Custom Metals

Mark Nosbusch

Labor Superintendent

Bill Allen

Shop Foreman

Making a Difference.

JMI's second-generation dedicated owners spend a considerable amount of time establishing and maintaining personal connections between the families & communities to which we operate.

Specialized Trade.

Because of JMI's long-term social connections within the community... We have a deep knowledge of our industry, partners & suppliers, and most importantly our customers.

Complexity to Rapid Response.

Our company's structure enables management to have a shortened distance from the frontlines, which translates over to effectively & efficiently deploying the right resources for a rapid response. 


Family owned businesses aren’t particularly thought of as being innovative.

However, our skilled craftsman have not only received extensive training by means of the Western Washington Sheet Metal JATC apprenticeship program.  JMI’s Employee Development program helps continue to advance skills and certifications to implement innovative results.

Building Information Modeling (BIM) was considered an industry “trend” over a decade ago. However, Johansen Mechanical was one of the first companies in the early 2000s to adopt the use of Revit MEP Software and begin integrating the BIM Model into our work processes. Although this was an investment in the beginning… Our proven methodologies have enabled robust communications and the ability to take a responsive approach to unforeseen or to potential problems throughout all stages of construction.  This has enabled our team to meet our clients’ needs within the original estimated costs and minimize the amount of potential change-orders.

Johansen Mechanical, Inc. was part of the beta tester community for testing and giving feedback on one of the most recognizable and commonly used Mechanical Estimating Software – QuoteSoft formally known as QuoteExpress.  This powerful solution has allowed our estimating team to generate onscreen digital takeoffs to estimate labor, material costs for ductwork, pipe, fittings, etc. for a variety of Mechanical & HVAC projects.

Our Purchasing Department, Project Management Team, and Accounting Staff have utilized the Dexter-Chaney construction and accounting management software Spectrum for over the past 15 years.  This system tied into our communitive process from QuoteExpress and Revit MEP software has enabled our team to provide robust/in-depth communications from between our internal operations as well as the partners, and trade members, clients, and owners to which we operate with on the regularly bases during all stages of construction.

In our shop, we have utilized a series of metal working technology that integrates with our CAD software to massively produce Mechanical & HVAC mechanical parts and assemblies, as well as our Architectural & Custom work.


Unique in our industry to be one of the few Sheet Metal Trade members to design/design-assist, fabricate, and install products for the entire building envelop, JMI's services are not limited to Commercial HVAC and Air Quality and Automation System Monitoring & Controls, but includes: Architectural Sheet Metal, Kitchens/Food Services, Medical/Healthcare and Custom Metal products.

We have performed work in notable buildings such as The Space Needle, Port of Seattle (SeaTac), CenturyLink Field, Safeco Field, King Street Station, Russell Investments, just to name a few.

  • Commercial HVAC & Air Quality
  • Automation System Monitoring & Controls
  • Architectural Sheet Metal & Custom Metal
  • Service & Maintenance
  • Kitchens/Food Services
  • Medical/Healthcare
  • Tribal
  • Educational (K-12 and Higher Education)
  • Transportation
Our Partners