About Us

Our Story

General Sheet Metal (GSM) was founded in 1932 and headquartered in Clackamas, Oregon. We are a Women’s Business Enterprise National Council (WBENC) certified woman-owned company that, for nearly 90 years, has partnered with a wide spectrum of clients who seek quality, value, and innovative solutions on their projects.

GSM continually leads the construction and manufacturing industry by evolving and expanding its offerings and core capabilities in architectural, mechanical, and HVAC (heating, ventilation, and air conditioning). Our teams work with a variety of materials: aluminum, brass, bronze, copper, composites, fiberglass, galvanized steel, steel, stainless steel, coated materials, and many more. We are recognized as a trusted and dependable source and leader in our industry.

Our dedicated team is ready to respond and assist our clients with the needs and requirements of their projects, from pre-construction through installation, and commissioning to ongoing service and maintenance.


Our Capabilities

Building exterior

Our extensive team collaboration through preconstruction, Integrated Project Delivery (IPD), design-assist, and design-build coupled with our in-house budgeting, Computer-Aided Drafting (CAD), building information modeling, and creative resources, provides us with appreciation and excitement to achieve the dreams and goals of our customers.

Mechanically, GSM offers everything from traditional HVAC installations to closely controlled ventilation systems for semiconductor, medical facilities, and commercial and industrial exhaust/ventilation systems to meet environmental control needs. Architecturally, we offer complete building envelope solutions and fabrication of aluminum composite material (ACM) composite panel systems copings and flashing.

With our specialty fabrication we produce handrails, custom countertops, metal artwork, signs, and elevator surrounds as well as custom restaurant exhaust-less hoods. Our Mitsubishi 4000-watt fiber laser can cut up to 80 inches wide by 158 inches in length in steel, aluminum, copper, brass, and bronze.

With our experienced management team, local fabrication, technical, and support capabilities, we are confident our teams will work seamlessly with your project team to accomplish the project goals while staying focused on safety, timing, and sensitivity to cost.

Executive Team


Thank you for your work on this project, it looks awesome.
- Sarah McLaughlin, Project Manager, INLINE Commercial Construction Inc.
“I wanted to thank you for the work you did on our varnish take fume extraction project. We got the exhaust fan powered up and did an experiment. With the VFD seat as low as 40%, we were able to capture 100% of the fog around the entire perimeter, it worked great!"
- Satisfied Customer
I would like to let you know that your crew is doing a great job performing their duties and meeting our tight schedule requirements.
- Daniel Talbott, Associate Engineer-MFN, Maxim Integrated
Wanted to pass along my sincere “thanks” to GSM for your support on the winterization project.
- Kolby D. Burmaster, Drilling Engineering Supervisor, Exxon Mobil Development
Thank you and your guys for helping us get to this point. Ya’ll really came through for us when we needed help and we really appreciate that.
- Matt Kuehn, P.E., Mechanical Engineering Manager, Parker Drilling
I wanted to express my appreciation for the outstanding efforts made by the contractor and OHSU West Campus in making not just one, but two difficult cutovers happened with such great success. Rarely have I seen groups come together this well and produce an outcome of this quality under the tight time frames as we had on these two projects.  From what I heard, this also occurred with minimal disruption and inconvenience to the building occupants.  To me this speaks as much to the quality of the individuals as it does to their skills.  I would welcome the opportunity to with work with all of these people again, although I’m sure we’d all prefer that it were under more normal conditions. So, thanks to all those “weekend warriors’ who gave up their weekends to make this all happen.
- Mazzetti & Associates
Your employee was here last week to dismantle our Dust Collection System did an AWESOME job! We were very happy with him; he was courteous and careful.  He went the extra mile, didn’t damage anything- machines or cabinets that were close by where he was working, even swept up after the job was done! It speaks very well of your company to have such an asset representing General Sheet Metal.
- Monocrest Inc.
Thank you very much for your attention to detail and the quality of work you and your staff have provided the Portland Police Bureau.
- Kelly VanBlokland
I want to thank you both again for a seamless install, the care and communication you took through the project was fantastic. I was very impressed with Phil’s coordination and site management of the project. Being new to the area, and not knowing subcontractors, you made me feel at ease through.
- Dallas Jannett, Project Manager, Kaiser Permanente Northwest
I really appreciate all the excellent work you and GSM have provided us this year. NIS in particular is leaps and bounds ahead of where we started the year.
- Brad Lyons, Project Manager, Kaiser Permanente
Your team was flawless in execution. Very impressive. The fan is on a VFD.
- Satisfied Customer
I would like to thank you and yours for the response in getting this repair knocked out for us so quickly. Thanks for the follow-up and pictures too. Look forward to hearing from you.
- Shiloh Baker, Epson
It is with great pleasure that I write this letter of recommendation. Working with you and your staff on the Gateway Discovery Park Project was a refreshing experience. Your collaboration, attention to detail and craftsmanship in completing the complex scope was evident in the final product. You approached the project with a teamwork mindset and your problem-solving skills helped deliver solutions that were mutually beneficial to GSM and City of Portland Parks. I write this letter without hesitancy in recommending General Sheet Metal on future projects. Should any of your prospective clients wish to talk with me first hand I can be reached at the contact information below. Your expertise was critical to the successful outcome on this project and I hope we have an opportunity to work together again.”
- Reid Blanchard, Construction Project Manager, Portland Parks & Recreation
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