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APEC Engineering of Montana delivers by utilizing their diverse experience in working with municipal, county, state and federal regulatory agencies as well as contractors, architects, scientists, surveyors, community professionals and owners.


They craft solutions while adhering to government regulations, code requirements, environmental concerns, maintenance requirements and public perceptions.


Their professionals guide, design, consult and assist their clients with all types of civil engineering projects.

APEC Engineering is located in Somers, MT and is licensed to provide  Engineering Services in Montana and North Dakota.





To assist their customers, APEC Engineering continues to research and educate themselves on the latest technology, delivery methods and products.


They strive to guarantee their consulting services and designs meet the goals of their customer's project, all while keeping in mind the cost-benefit of the solutions they deliver.  An experienced staff and understanding of the latest products allows us them deliver the results for your specific project.


When partnering with APEC Engineering, you'll be welcomed to participate in the design and product selection of your project.

Marc Liechti

Marc is the owner and principal of APEC. He provides APEC with great knowledge and expertise in infrastructure design, water utility and wastewater treatment design and implementation, and the subdivision planning process. His talent for translating clients project goals, budget requirements and project schedule into the highest quality designs, results in significant cost savings. It is Marc’s personal commitment and proven ability to understand and manage the entirety of a project from initial concept to construction, which adds substantial value to every project and produces satisfied clients.


Justin Ahmann, PE, CFM

Justin is our Director of Civil Engineering and Project Manager. He provides APEC with a strong understanding of the Civil Engineering field, from preliminary concept through construction. His primary responsibilities include: storm water management, water system design, erosion and settlement control, wastewater system design and analysis, commercial and residential site development, water beneficial and environmental permitting, and construction management. Justin is currently licensed in Montana, North Dakota and Virginia. He is also an ASFPM Certified Floodplain Manager and a certified water and wastewater operator.

Director of Civil Engineering

Kim Larson, AIA

Kim is our Senior Project Manager and Senior Architect. Kim has in-field construction experience to compliment his architectural background. He is responsible for the planning and design of our projects and oversees that each project meets requirements, deadlines and specifications. His primary responsibilities include: commercial and residential structure planning and design, site planning and layout, planned unit development design, and construction administration.

Senior Project Manager/Architect

Tobias Liechti, PE

Toby is our Design Engineer and Construction Inspector. He provides APEC with a well-rounded knowledge of civil engineering including environmental monitoring and construction field experience. Toby provides the necessary skills to coordinate project information from all disciplines to initiate & monitor construction and he understands the importance of an accurate and well-coordinated communication. His primary responsibilities include: residential and commercial site design, water system design, sanitary sewer design, storm sewer design, and construction administration.

Civil Engineer

Tamara Tanberg

Tamara is our Architectural Designer. She provides APEC with a diverse skill set, working from subdivision layouts and submittals to residential home design. 

Architectural Designer/Subdivision Coordinator

Tristram Coffin

Tristram prepares computer rendered drawings that include civil plan sets, 3-D models, contour maps and graphics. 

CAD Technician

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the team


Not only does APEC Engineering provide their communities with reliable engineering design, but they also strive to be involved in other ways. Here are a few programs that APEC Engineering is especially proud to be a part of.

Kalispell Lakers Baseball

Several APEC employees serve as either board members or regular volunteers for this fantastic youth sports organization. If we're not at the office, there's a good chance we're at a game!

24 Hours of Flathead

12 & 24 Hours of Flathead Mountain Bike Race is a a non-profit organization that provides adaptive sports equipment and recreational opportunities to those who live with paralysis and other life altering disabilities in the Flathead Valley and other surrounding valleys. APEC is proud to be a sponsor of this great organization as well as having several employees volunteer during the race.

Local Chambers

APEC is proud to be a member of several area chambers of commerce. APEC regularly attends chamber meetings and networking events.

Glacier Park International Airport

Marc is a current board member for GPIA. He is heavily involved in the decision making for the airport, from construction projects to adding more flights to the airport.

Community Boards

Justin serves on several area boards, including: FCEDA, Flathead County West Valley Land Use Advisory Committee, City of Kalispell Stormwater Advisory Commitee, and the City of Kalispell Impact Fee Committee. 

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