Our Story


CTA Architects Engineers' founders, Ralph H. Cushing and Everett O. Terrell
Founders Ralph H. Cushing (standing) and Everett O. Terrell review designs circa 1965.

We might be old, but we’ve aged gracefully. Back in 1938, founders Cushing and Terrell believed integrating architecture, engineering, and design opened the doors for deepened relationships and enhanced creativity — and that hasn’t changed. Generations of collaborative practice have proven the benefit of working shoulder-to-shoulder to yield broader viewpoints and better design solutions.

But our passion to forever improve is inherent. “The way it’s always been done” isn’t always the best way, which is why we implement programs that challenge us to perform above standards and beyond past successes. As a team, we champion diversity, equity, and integrity in all forms — this means placing people at the center of our practice.

After all, our mission is to invent a better way of living. We find joy in uncovering imaginative solutions for the people who work here, the people we work for, and the planet as a whole. Our broad range of specialized service offerings and global project locations make every day unique, and a love for exploring new frontiers is what keeps the pioneering spirit of our founders alive.

What We Do


Emphasizing active listening and collaborative exploration to guide you through the design process, from ideation to occupancy.

Energy Services

Analyses of energy use to optimize consumption and production to meet financial and sustainability goals.


Civil, Electrical, Mechanical, Refrigeration, Structural, and more. We have a full complement of engineering specializations.

Environmental Solutions

Evaluate property and exposure risks, protect air and water resources, and revitalize your site.

Enhancing the human experience through environmental graphics, branding, interactive media, and dynamic wayfinding.

Historic Preservation

Concentrated efforts to ensure stability while retaining significant, historic, character.

Interior Design

User-focused planning process paired with curated design to create unique spaces supporting the indoor human experience.

Landscape Architecture

Design solutions that reinforce and enhance connections between built and natural environments.


Utilizing sound growth principles and superior design communication to craft aspirational community plans for cities and counties.

Markets We Serve

Commercial design for this mid-rise tower, the Eighth & Main Building, in downtown Boise, Idaho


We aim to inspire interaction, motivation, and team member satisfaction in every commercial environment -- from corporate offices to financial institutions, corporate developments, industrial spaces, community centers and more.

Education design (school library) for Bigfork High School in Bigfork, Montana


We are convinced of and inspired by the inherent connections between the schools we design and the people who teach and learn within their walls. Our educational design encourages student flexibility, collaboration, and active learning.

Government design for Kenai National Wildlife Refuge Visitor Education Center in Soldotna, Alaska


Our diverse governmental team provides a wide range of professional services -- including planning, budgeting, documentation, analysis, and design -- to the full spectrum of public agencies at the local, state, and national levels.

Healthcare design of patient rooms at Billings Clinic in Billings, Montana


Improving the lives of patients and caregivers is paramount. We reimagine healing environments to provide inspirational designs emphasizing sustainability and wellness, and to deliver service allowing our clients to focus on their patients.

Design of a breathtaking custom home in Jackson Hole, Wyoming


From executive residences to multi-family dwellings to hotels, we believe residential design is about realizing clients' dreams while ensuring final products mesh with their surroundings and perform at the highest levels.

Retail design for Metropolitan Market in Sammamish, Washington


Facilitating relationships by encouraging shared experiences, we design through the study of human behaviors and observing the way people use social spaces. We believe in the power of retail in its many forms to bring people together.

Sustainable Practice

As part of the Environmental Protection Agency’s Green Power Partnership, Cushing Terrell invests in Renewable Energy Certificates (RECs) for 100% of our operational power needs — accounting for all 13 of our offices and every remote team member. We walk the walk, and thrive on opportunities to challenge convention.