Donald L. Gribble, P. E., Principal

Donald-with-plans-smallDonald Gribble is a Registered Professional Engineer. During high school and college, Donald worked in the Agpro dairy equipment production and engineering departments. Since then, he has worked as a Mechanical Engineer at General Dynamics and as an Electrical Engineer at Pacific Northwest Laboratories, where he gained experience in managing large technical projects, research and design. Since 1992, he has been with Five-G Consulting, developing and designing custom waste management systems and equipment for dairy and swine facilities. Donald has designed numerous dairy facilities from preliminary to detailed design. His projects range in size from several hundred to several thousand cows, and for various locations from California to Canada. He has supervised the construction of two large dairy facilities in the Midwest. Areas of expertise include design, working with state and local regulatory agencies, hiring and supervising major contractors, automation systems and equipment issues.

States Registered In:

  • Idaho
  • Wisconsin
  • Minnesota
  • California
  • Illinois
  • Texas
  • South Dakota
  • Iowa
  • Missouri
  • Ohio


  • Bachelor of Science, Mechanical Engineering 1981; Texas Tech University
  • Master of Science, Electrical Engineering 1991; Oregon State University

Years With Five-G: 18