Office Locations

C. H. Guernsey & Company has spread from its Oklahoma roots to become an international engineering, architecture and consulting firm. We have performed work in every U.S. state and in many countries around the world.

Whether you need construction management in Texas, have a design/build project in Florida, need an environmental site assessment in Washington or have security concerns as far away as Italy and China – our engineers, architects and consultants are able to serve you.

GUERNSEY's headquarters is located at:

5555 North Grand Boulevard
Oklahoma City, Oklahoma 73112-5507
Phone: 405.416.8100 / Fax: 405.416.8111
[MapQuest] | [PDF Map] (88kb)

Our regional offices are located at: