Ralph Bartram


As COO, Ralph’s vast field experience enables him to oversee all of the daily field operations; including execution of work, project management, scheduling of work, subcontractors, safety, and Centurion’s field supervision.

Nate Book


Having been involved in construction for over 25 years, Nate’s knowledge of the industry and the construction process is comprehensive and proven. As CEO, Nate oversees the pre-construction and construction phases from design and estimating, business development, office and project management. Nate operates with a strong civil background and a proactive approach to land development, design build and value engineering. Nate is driven to creatively lead the company culture at Centurion with the goal of supporting and championing the professional goals of every employee.


Nate has shared his experience with students at Pennsylvania College of Technology as a guest lecturer, has served on various boards, volunteered for numerous non-profits and churches, and remains extremely active in the day-to-day business at Centurion. Nate has a passion to serve, which translates throughout all of Centurion and ultimately to our clients.