On Friday, December 6th, our Grand Rapids office will close at 11:45 am EST, for employee festivities. Happy Holidays!


Senior Project Manager

Dan joined the O‑A‑K team in 1992 as a Project Superintendent, and for the past 27 years he has been a Project Manager. He holds his Bachelor of Science in Construction Science and Management from Western Michigan University.

Dan Rathburn jacket 2

What do you do in your free time?

Who is your favorite singer?