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: $

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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

10/28/2026

Our Guernsey crew grew a little for family day at the zoo! 🦒

Our employee-owners brought their families along for a day of exploring, catching up, and spending time together. It was a chance to get to know the people we work with a little better and the families who cheer them on.

Thanks to everyone who joined us and made it such a fun day!

10/17/2026

Homecoming has a way of bringing everyone back together, and we’re celebrating with a look inside the Alpha Delta Pi chapter house at Ole Miss!

One of our interior designers contributed to these spaces, and we’re excited to share their work. It’s especially meaningful knowing this house is part of so many sisters’ college memories, with plenty more still to come.

Happy Homecoming, Ole Miss! 💙

| Alpha Delta Pi at Ole Miss

10/16/2026

A new home for spaceflight is coming to Burns Flat, and we’re excited to have a hand in designing it!

Dawn Aerospace has broken ground on its Mission Control & Operations Facility at Infinity One Oklahoma Spaceport. The 15,000-square-foot development will bring together mission control, flight simulation space, and a hangar for the Aurora spaceplane, plus indoor viewing areas where spectators can watch flights.

For our architects, it’s exciting to see the drawings move toward construction. For Oklahoma, it’s another step toward new possibilities in spaceflight and research!

10/07/2026

Good design starts with understanding the people who will experience it.

Our architect, Kathryn Parkhurst, recently presented on Trauma-informed Design at the AIA Oklahoma Conference on Architecture, explaining how thoughtful design can help create spaces that feel safer, more comfortable, and more supportive.

She highlighted a recent piece of work (concept shown here) exploring how design can support vulnerable people while balancing privacy, connection, and a sense of belonging.

We’re proud to see our team sharing their knowledge and helping bring people-centered design into the conversation.

Read more: https://bit.ly/4d7LC4f

| American Institute of Architects - CENTRAL OKLAHOMA CHAPTER

10/05/2026

Q2 was another busy quarter serving electric cooperatives across the country. ⚡

From cost-of-service and arc flash studies to load forecasting and CMMC assessments, our growing team continues to help co-ops strengthen operations and plan for what’s ahead.

And with that growth, we’re excited to welcome Eric Blake joining Guernsey with more than 25 years of experience in cost of service and rate studies. His expertise helps us expand our support to electric cooperatives and the communities they serve.

If your cooperative is evaluating rates or just looking for greater clarity around cost of service, let’s talk about how Eric and the team can help.

10/01/2026

Guernsey is nothing without our people.

As we head into ESOPtober, we’re celebrating what makes being 100% employee-owned so meaningful. Every project, partnership, and success at Guernsey is made possible by the ones behind it.

Our employee-owners aren’t just part of Guernsey. They are Guernsey.

From the work we do to the relationships we build, it’s our employees who make Guernsey what it is. We’re proud to be 100% employee-owned and even prouder of the individuals who make it possible.

09/29/2026

Career fair season may be over, but we’re still thinking about all the great conversations we had along the way! 🎓

Our team had a great time meeting students, talking about life at Guernsey, and learning more about the people who will shape the future of our industry.

Across this year’s career fairs, we collected roughly 200 resumes and met plenty of talented students along the way.

Thanks to everyone who stopped by to meet our team. We’re looking forward to seeing where your careers take you!

09/25/2026

A beautiful sunset over a facility that's already making an impact in Newcastle.

Since opening, the Newcastle Fire Station has supported nearly 3,000 calls while also becoming a hub for training and community engagement. Its large training room has allowed the department to host classes for other departments and agencies, while a new internship program with Newcastle High School gives aspiring firefighters a semester of hands-on experience training, cleaning, running calls, and experiencing the daily life of a firefighter.

The station has also opened its doors to the community, welcoming Boy Scouts, daycare and preschool groups, church daycares, families, and others for tours of the new facility.

We're proud to see the station serving as more than a workplace. It's a place to serve, train, learn, and connect with the Newcastle community.

| Newcastle Fire Department

Photo: Scott Hannan

09/22/2026

What if the spaces we design could help people feel safer, more comfortable, and more supported?

Tomorrow, our very own Kathryn Parkhurst will be sharing insights on Trauma-Informed Design at the AIA Oklahoma Conference on Architecture. The presentation will explore how thoughtful design can respond to the experiences and needs of the people who use our spaces every day.

We’re excited to see our team bringing this important conversation to the conference!

| American Institute of Architects - CENTRAL OKLAHOMA CHAPTER

09/16/2026

We’re at the Oklahoma Municipal League Annual Conference and loving it!

We’re proud to showcase Guernsey’s work with municipalities across Oklahoma and connect with the leaders moving their communities forward

Stop by and see us at booth 509!

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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