What are the opening hours?

Monday 8am - 5pm Tuesday 8am - 5pm Wednesday 8am - 5pm Thursday 8am - 5pm Friday 8am - 5pm

Guernsey US

Name: Guernsey US
Address: 5555 N Grand Boulevard, Oklahoma City, OK, 73112, US
Telephone: (405) 416-8100
Price range: $

Guernsey is a multidisciplinary design and consulting firm advancing sustainable practices, enhancing the built environment, and 100% employee-owned.

We are a multi-discipline firm, employing engineers, architects, planners, consultants, environmental scientists, interior designers, analysts, accountants and managers. Our clients include federal, state and local government; military entities; utilities; Native American Tribes; universities; Fortune 500 companies; oil & gas companies; unicorns and more. Okay, so maybe not unicorns, but the rest

is true, and because we offer this all under one roof, we’re able to collaborate efficiently. Thus, giving you access to expert advice in a variety of disciplines and business sectors. More than 85 years of history is a hard thing to sum up, so let’s see what we can do to relate ours to yours …check us out at www.guernsey.us

06/11/2026

Join us in congratulating Laura Fawcett on her promotion to Director of Cybersecurity Assessments! 👏

Laura has played a pivotal role in building and advancing Guernsey’s cybersecurity assessment practice, helping establish our position as a trusted leader in the Cybersecurity Maturity Model Certification (CMMC) ecosystem. In her new role, she will lead our assessment services, guide assessment teams, and continue supporting organizations as they navigate increasingly complex cybersecurity compliance requirements.

Earlier this year, Laura was also appointed to the CAP Committee of the Cyber AB’s C3PAO Advisory Council, a body that helps shape and uphold the standards that guide CMMC assessments nationwide.

Read more here: https://bit.ly/4exXv4q

06/10/2026

Turn on your AirDrop! 📲

Our summer interns toured the Guernsey HQ to see what all the excitement is about! From the mass timber structure and floor-to-ceiling windows to the innovative Under-Floor Air Distribution System, they got an up-close look at the design features that make our office unique.

We are laying the groundwork for the summer, and we're just getting started!

06/04/2026

Say Hello to Guernsey’s 2026 Interns! 👋

You’re looking at the group slated to support our engineering, architecture, interiors, and electric utility teams this summer.

Just being a fly on the wall during their first day, you get this sense of excitement, curiosity, and an eagerness to jump right in and learn alongside industry professionals.

Keep checking back throughout the summer to see where their experiences take them, the real projects they’ll work on, and how they finish strong.

Welcome to the team!

06/02/2026

What you don’t see is just as impressive as what you do.

Before a single piece of mass timber arrived on-site, every pe*******on, connection, and opening was carefully coordinated in the design process.

There are no last-minute adjustments or field modifications. When the timber arrives, it fits together like a giant jigsaw puzzle, each piece exactly where it’s supposed to be. 🤝

06/01/2026

Where are our interns now?

Ty Brown-Field, an architectural intern last summer, alongside two classmates, was awarded a grant from their proposal, which explores affordable housing opportunities in OKC through the adaptive reuse of old hotels and buildings into Single Room Occupancy (SRO) housing. The team received this grant from the Gibbs College of Architecture to support their research and continuing education.

We’re proud to see our interns creating such impact in our community!

05/27/2026

Work environments often struggle with a balance between collaboration and privacy. Both are needed, so how do you address it?

Guernsey’s interior team approached one project with glass-enclosed meeting hubs that create privacy without feeling closed off. Subtle green accents were added throughout the space to bring a sense of calm and focus.

For group work, a light-filled conference room opens into the larger environment, encouraging connection.

Because the best workplaces don’t force you to choose between working together and having space to think.

| CompSource Mutual Insurance Company

05/26/2026

If you’ve driven past downtown OKC, you’ve definitely noticed the bold, unique building taking shape… well, Guernsey is coordinating the interior design for the project, which provided some awesome challenges.

An irregular quadrilateral footprint means no easy angles and no room for wasted space.

Our team tackled the challenge with strategic space planning to eliminate dead zones and avoid long, tunnel-like corridors, while maximizing height with exposed ceilings and walls pushed to the structure.

Behind the scenes, it took thoughtful engineering and tight coordination to ensure balanced airflow and lighting: using a zoned mechanical system to prevent hotspots and dark corners.

05/25/2026

In observance of Memorial Day, Guernsey offices will be closed Monday, May 25.

We honor and remember the brave men and women who made the ultimate sacrifice in service to our country. We will resume normal operations on Tuesday, May 26. ❤️

05/21/2026

Electrical systems don’t get many second chances. That’s why planned maintenance matters.

During a recent scheduled power shutdown for an industrial client, Guernsey’s electrical engineering team reviewed and evaluated the facility’s electrical system for power quality issues while equipment was safely offline.

It’s the kind of work most people never see behind panel doors, inside critical systems focused on reliability, safety, and preventing problems before they happen.

Guernsey understands the value of proactive electrical system assessments; it's just one of the many services our teams provide to help clients keep critical infrastructure running safely and efficiently.

05/19/2026

Congratulations to Ole Miss ADPi on the ribbon cutting of their new addition: the Diamond Wing!

Our interior designers enjoyed working with you on this space! We hope you love your new addition to your beautiful home! Check back soon to see more of our design in the addition! We hope you enjoy the Chapter Room! ✨

| Alpha Delta Pi at Ole Miss

Address

5555 N Grand Boulevard
Oklahoma City, OK
73112

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Telephone

(405) 416-8100

Website

http://www.guernsey.us/

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