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Mechanical & Electrical Engineering in Tacoma, WA

About Us


At Tres West, our mindset is that it’s not about us. It’s about the families, students, and patrons who will call the places we design home, school, and work.  It’s about providing warm, comfortable, efficiently-illuminated areas for people to celebrate special occasions, learn something new, and make new discoveries.  We are honored to provide our expertise for such moments and strive to create enjoyable environments for people to learn, live, work, and connect.



Our Values


We see how our work contributes to the everyday experiences of our communities by making a long-term impact.  People are at their best when they are most comfortable, when they have the best lighting for their workstations, and when they have modern technology to collaborate.


Tres West understands our responsibility in creating dynamic and sustainable environments for our communities to aspire to their greatest potential.


  • In our schools, we envision a child who can comfortably take off their coat, be amazed by something alive through the lens of a microscope, and, with curiosity, rush to a computer to learn everything they can about microscopic life.
  • In our homes, we visualize a dinner table decorated for that special occasion in a room full of warmth, immersed in the aroma of tradition in the air.
  • In our work places, we see a technician working late into the evening with the hope of making a life-changing discovery, surrounded by technology that will help make that discovery a reality.
  • In connecting these places, we see a family outing to the park and a stop to browse at the local market, made possible by convenient public transportation.


Throughout everything, from education to housing to transportation to offices, we are inspired by the people and the potential of our communities.  As a result of our forethought, efficiency, and dedicated design, we value our contribution for positive change and an enhanced quality of life. Above all, we endeavor to not lose focus on our stewardship of the environment in which we all live.





Tres West is proud to have always operated as a minority-owned firm.  Starting with our founders, our origins bring unique cultures as far away as Bolivia and China.  Through the years, our firm has grown and changed leadership while being enhanced by the diverse backgrounds of its owners and employees.


Tres West Engineers is a State and Federal certified diverse firm. DBE ● WMBE ● SCS ● SDB ●WOSB ● EDWOSB







Our firm is proud to celebrate our 40th anniversary in 2017.  Here are a few milestones we’ve collected along our journey:



Tres West Engineers is incorporated.  An early diverse business, Adolfo Fito Koenig of Bolivia became the founder of our firm, joined by Pacific Northwest locals Mel Hampson and Lamarr Warter.



A supporter of our local military, Tres West participates in our first military project with the Army/Air Force Exchange Service.  Since then, we continue to provide federal design services with JBLM, Bangor Naval Base, Yakima Training Center, and Veterans Affairs.



Charles Li joins as a partner of the firm and remains a strong employee on our electrical team today. An incredible trailblazer, Charles Li provides foundational leadership and direction in the early stages of our company and drives a highly responsive and hands-on approach to design services.  Charles also firmly establishes the electrical department and over the next 38 years throughout Washington, Oregon and Idaho contributes to the development of the Pacific Northwest Region.



Tres West plays a part in opening a new park in Old Town Tacoma, Commencement Park near Ruston Way, now renamed Jack Hyde Park. Over the years, Tres West completes designs for Pacific Northwest landmarks such as Woodland Park Zoo, Pantages Theatre, the Seattle Aquarium and museums and memorials throughout the area.



Tres West’s first school design project, Michael T. Simmons Elementary School, opens after replacement in Tumwater. Soon to follow, East Olympia School was constructed in 1989. Since then, Tres West has worked with over 100 school districts and higher education organizations in the Pacific Northwest Region completing designs for new construction, remodels, and system upgrades.



Wing Li becomes a partner and is an instrumental leader to the mechanical department, working with specialized clients such as Qwest in opening the IT infrastructure of Puget Sound.  After 30 years with Tres West, Wing Li retired in 2016.



Tres West begins design services for Starbucks throughout the NW region, completing surveys and designs for over 130 stores.



Design begins for Community Transit’s Mountlake Terrace Transit Center, a key link between Snohomish County and Downtown Seattle.  The Park & Ride opened in 2009 and was awarded a Green Globes™ certification in 2011, one of the first non-resident buildings recognized for environmental and energy efficient design by the Green Building Initiative. Tres West continues its strong contribution with transit and transportation authorities throughout the region today.



Larry Elliott becomes a partner of the firm and worked tirelessly to strengthen our electrical K-12 presence. After 32 years with Tres West, Larry retired in 2016.



Tres West completes its 3,000th project.



Tres West completes its first international project in Australia.



Sean Roy and David Moore become firm owners and remain leaders of the firm’s two disciplines, Mechanical and Electrical engineering.



Tres West’s first luxury high rise, Seattle’s 40-story tower Premiere on Pine, opens.  Tres West continues apartment and hotel design with projects such as the 970 Denny high-rise, 12-story Urban Green Villa Seattle apartments, and the Tacoma Convention Center Hotel.



On the eve of the firm’s 40th anniversary, Jenifer Moore comes on board as the firm’s leader and President and unveils Tres West’s new Mission Statement: Creating environments of learning, living, working, and connecting through high quality professional design™.





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