What departments does Guernsey have?

Guernsey has employees across 17 departments including Entrepreneurship, Business Development, Solutions Engineering, Finance, Program & Project Management.

What is the largest department at Guernsey?

The largest department at Guernsey is Engineering with 8 employees.

Where are Guernsey employees located globally?

Guernsey has employees across 5 continents and 5 countries including South Africa, United Kingdom Of Great Britain And Northern Ireland, United States Of America, Australia, Guernsey.

How has Guernsey's team size changed over time?

Guernsey's team has decreased from approximately 142 to 138 employees based on available data.

Guernsey Employee Directory

Architecture and PlanningOklahoma, United States51-200 Employees

Guernsey is a mid-sized, multidisciplinary design and consulting firm based in Oklahoma City, Oklahoma. Founded in 1928, it operates on five continents and offers a broad mix of architecture, engineering, economic and management consulting, environmental and transportation planning, and cybersecurity services. The firm emphasizes sustainability and aims to improve the built environment through integrated, cross-disciplinary work, and it is fully owned by its employees, reflecting an entrepreneurial, culture-driven approach. Guernsey serves clients across diverse industries with planning, design, and advisory capabilities that address complex infrastructure needs. Recent developments include collaborations with Siemens on electricity strategy, with HoganTaylor LLP to expand cybersecurity maturity services, and a city planning engagement with the City of Cushing.

Guernsey Global Highlights

North America
307

United States Of America
307

Europe
5

United Kingdom Of Great Britain And Northern Ireland
5

Africa
1

South Africa
1

Oceania
1

Australia
1

Guernsey's Leadership

H. A.
Vice President Energy & Utility Solutions
Mobile Phone
Email
H. G.
President
Mobile Phone
Email
J. B.
President
Mobile Phone
Email
M. G.
President
Mobile Phone
Email
L. M.
Owner
Mobile Phone
Email
M. D.
Vice President
Mobile Phone
Email
D. O.
Ae Business Development Director, Vice President
Mobile Phone
Email
D. M.
Senior Vice President
Mobile Phone
Email

Guernsey Employee Metrics

100%

50%

0%

2026

2025

Arts & Design
Engineering
Information Technology
Program & Project Management
Consultant
Other

Contact profiles from Guernsey

Name

Title

Contact Info

Location

Last Update

D. L.
Fire Protection Engineer
Mobile Phone
Email
E. G. M. C. C.
Cyber Security Consultant
Mobile Phone
Email
Mar 18, 2026
G. M.
Sales
Mobile Phone
Email
Oct 17, 2024
J. W.
Warehouse Worker
Mobile Phone
Email
Oct 23, 2024
J. G. C.
Working In Finance In Guernsey Since 1989
Mobile Phone
Email
Guernsey
Apr 28, 2023
J. P.
Moray House
Mobile Phone
Email
GuernseySaintpeter Port
Aug 04, 2024
K. D.
Customer Service Representative
Mobile Phone
Email
Jun 24, 2025
M. N.
Consultant
Mobile Phone
Email
Oct 16, 2024
M. H.
Consultant
Mobile Phone
Email
Oct 18, 2024
M. R.
General Counsel
Mobile Phone
Email
Guernsey

Frequently Asked Questions

What is Guernsey known for?

Guernsey was founded in 1928 operates in the Architecture and Planning industry; you can contact the main corporate office by phone at

+1-405-416-****

. Explore Guernsey's company overview page for more information.

What is Guernsey's most common email format?

Guernsey employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Guernsey email formats with LeadIQ.

How many employees does Guernsey have currently?

Guernsey has approximately 163 employees as of July 2026. These team members are located across 4 continents, including North AmericaEuropeAfrica.

Who are Guernsey's key employees and leadership?

As of July 2026, Guernsey's key employees include:

Vice President Energy & Utility Solutions: H. A.
President: H. G.
President: J. B.
President: M. G.
Owner: L. M.

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Guernsey Employee Directory

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