Insights

Sustainability opportunity Guernsey emphasizes sustainable practices across architecture, engineering, and planning. Sales teams can position integrated design services to help clients meet ESG goals, pursue green building certifications, and optimize lifecycle performance.

Cybersecurity growth With a track record in cybersecurity solutions and partnerships (including CMMC services), there is a pathway to expand offerings for government contractors, defense-related projects, and critical infrastructure clients requiring strong cyber postures.

Digital transformation Tech stack across AutoCAD, AWS, Microsoft 365, and data platforms suggests readiness for clients seeking modernized design workflows, cloud-based collaboration, and data-driven planning and analytics.

Strategic partnerships Recent collaborations with HoganTaylor and Siemens indicate an appetite for joint ventures. Explore co-delivery on large-scale energy, transportation, and urban planning projects to access broader client networks.

Growth and retention Revenue scale and a diverse service mix, including environmental and transportation planning, position Guernsey as a potential partner for multi-discipline programs and long-term framework agreements in both public and private sectors.

Similar companies to Guernsey

Guernsey Tech Stack

Guernsey uses 8 technology products and services including iCIMS, AutoCAD, Amazon Web Services, and more. Explore Guernsey's tech stack below.

Media & News

Guernsey's Email Address Formats

Guernsey uses at least 3 email formats:
Guernsey Email FormatsExamplePercentage
First.Last@guernsey.usJohn.Doe@guernsey.us
98%
LastFirst@guernsey.usDoeJohn@guernsey.us
1%
F.Last@guernsey.usJ.Doe@guernsey.us
1%

Frequently Asked Questions

What is Guernsey's phone number?

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You can contact Guernsey's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Guernsey's stock symbol?

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Guernsey is a publicly traded company; the company's stock symbol is SIGB.L.

What is Guernsey's official website and social media links?

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Guernsey's official website is guernsey.us and has social profiles on LinkedIn.

How much revenue does Guernsey generate?

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As of August 2026, Guernsey's annual revenue is estimated to be $100M - $250M.

What is Guernsey's NAICS code?

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Guernsey's NAICS code is 54131 - Architectural Services.

How many employees does Guernsey have currently?

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As of August 2026, Guernsey has approximately 177 employees across 4 continents, including North America, Europe and Africa. Key team members include Vice President Energy & Utility Solutions: H. A., President: H. G. and President: J. B. Explore Guernsey's employee directory with LeadIQ.

What industry does Guernsey belong to?

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Guernsey operates in the Architecture and Planning industry.

What technology does Guernsey use?

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Guernsey's tech stack includes iCIMS, AutoCAD, Amazon Web Services, Sucuri, Microsoft SQL Server, Microsoft 365, Kronos and Piwik PRO Core.

What is Guernsey's email format?

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Guernsey's email format typically follows the pattern of First.Last@guernsey.us. Find more Guernsey email formats with LeadIQ.

When was Guernsey founded?

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Guernsey was founded in 1928.
Guernsey logo

Guernsey

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.

Section iconCompany Overview

Phone number
Stock Symbol
SIGB.L
NAICS Code
54131 - Architectural Services
Founded
1928
Employees
51-200

Section iconFunding & Financials

  • $100M - $250M

    Guernsey's revenue is estimated to be in the range of $100M - $250M

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