Our Story


CTA’s design philosophy is embodied in an open and collaborative process; together with our clients, we pioneer environments that are innovative and creative, and provide the structure for integrated design that fosters sustainable strategies. We listen and learn from our clients, creating meaningful design solutions that are unique to their needs.



Organized in 1938, CTA has grown to provide a variety of building services. Each year, CTA completes more than 1,200 projects, translating into $400 million in construction costs. Projects include educational facilities, medical clinics, hospitals, residences, planning, and recreational, commercial, retail, and industrial developments.

In addition to architectural services, CTA provides mechanical, electrical, structural, and civil engineering, landscape architecture, interior design, and a range of specialized services in such areas as cost estimating, commissioning, code review, and roofing for our clients.

Our comprehensive approach and staff of 390+ professionals allow CTA to provide our clients with a high level of services and unbeatable value. CTA pioneers environments: we balance budgets and schedules while providing innovative design solutions. We also provide value engineering, energy studies, indoor air quality, Americans with Disabilities Act (ADA) compliance, and roofing consultation. Our expertise in these areas adds value to each client’s project.

Our offices are located in:

  • Billings, Bozeman, Missoula, Great Falls, Helena, Kalispell, Red Lodge, and Livingston, MT
  • Gillette and Jackson, WY
  • Boise, ID
  • Denver, CO
  • Seattle, WA
  • Austin, TX
  • New Orleans, LA
  • Minneapolis, MN
  • Vancouver, BC
  • Regina, SK

CTA is proud to exceed the expectations of our clients worldwide.

CTA integrates the skills and expertise of more than 20 different technical disciplines into hand-picked teams for any given project. With multiple disciplines working side by side, and thriving on the energy inspired by collaboration, CTA teams develop progressive designs for a wide range of projects in the six market sectors we serve: Commercial, Education, Government, Healthcare, Living, and Retail.

At CTA, we pride ourselves on an approach that we have termed High Performance. It is the product of uniting talent, passion, and expertise; developing integrated teams of top notch architects, designers, engineers, interior designers, landscape architects, project managers, and visionaries working together in creating a pinnacle of both form and function.

We recognize and celebrate the many relationships that occur and are maintained throughout the course of creating dynamic environmental spaces. From the initial meeting to the final reveal of any project, the ever-present interactions between clients, designers, and building professionals comprise what we commonly refer to as The Experience. In short, The Experience is the essence of every point of contact and every nuance associated with CTA.

CTA is an “all-in-one” architecture and engineering firm with the comprehensive resources it takes to guide a project from conception to utilization of the facilities. Every design resource needed is housed within one innovative firm – CTA.

  • Solid Solutions — CTA focuses on designing within context. We listen to clients and create answers to their needs while focusing on functionally, sustainability, and design excellence.
  • Expedited Service/Less Hassles — As an integrated firm, we will spend more time advancing your project and less time coordinating with outside entities.
  • Accountability — One company, providing the ultimate level of accountability. We take a partner’s interest in our clients’ success and we stand behind our work.
  • Creative Teamwork — At CTA, we work together as a team, combining our unique talents, innovative thinking, and resources to pioneer environments.

As a member of the U.S. Green Building Council, CTA embraces sustainable building practices. We wholeheartedly accept our responsibility and leadership role in advancing design and building practices that protect our natural resources. Our LEED® Accredited Professionals, energy conservation and alternative energy design solutions, and on-going staff training in sustainable design practices demonstrate our commitment to protecting the environment.