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Oklahoma City, Oklahoma, US
Employee-owned multidisciplinary design and consulting firm providing engineering, architecture, planning and environmental services to government, military, utility and private-sector clients.
Guernsey is an employee-owned multidisciplinary design and consulting firm, founded in 1928 in Cherokee, Oklahoma, to support rural municipalities during the Great Depression. It is now headquartered in Oklahoma City, with additional offices in Tulsa, San Antonio, Kailua and Washington, D.C., and has completed projects on five continents.
The firm delivers integrated engineering, architecture, planning, environmental science, design and analysis, accounting and project management services. Its technical domains span civil engineering, architecture, planning and environmental science, applied collaboratively to complex projects for federal, state and local government clients, military installations, utilities, tribal communities, higher education institutions, oil and gas companies and Fortune 500 firms. Among its notable projects are the Oklahoma City Thunder Practice Facility and Boeing's High-Bay Research Facility.
Guernsey is 100% employee-owned through an Employee Stock Ownership Plan, giving every team member a financial stake in the firm's performance. The company emphasises integrity, teamwork and professional growth within a collaborative, multidisciplinary working environment, drawing on more than 95 years of continuous practice.