About Us

CES Group P.A. was formed in the Fall of 2009. Its proceeding companies, dating back to the 1960’s, include Grove & Company, Cohorst & Associates (1982-2001), and Cohorst Engineering & Surveying (2001-2009). Like our predecessors, CES Group will continue to provide innovative engineering & surveying services to our clients. Our service area includes Northeast Kansas and Southeast Nebraska with a focus on the counties of Washington, Marshall, & Nemaha in Kansas. Providing cost effective services with a personal touch is our goal and we expand on that goal by keeping up with new technologies and building relationships with our clients.

Civil Engineering

  • Tony Duever, PE

Land Surveying, GPS/GIS, MTI & Flood Elevation Mapping & Drafting

  • Robert Peschel, LLS, LPA
  • Clint Friedrichs, AAS, LPA
  • Nick Rengstorf, AAS, LPA

Support Staff

  • W. Charles Weickert, LPA
  • Joseph Peschel, LPA

Office Manager & Secretary

  • Sandra L. Burton