Medical Gas Systems, Inc. was formed through the merging of Doerksen Medical Gas Systems and Medical Gas Associates. Doerksen Medical Gas Systems was founded in Canada and incorporated in 1975. It began serving US health care facilities in 1979 and in 1984, Doerksen Medical Gas/US was incorporated in the state of Arizona. Medical Gas Associates was started in Columbus, OH. It served medical facilities in Ohio, Indiana, Kentucky, Michigan, and Pennsylvania. Our company today serves medical facilities all across the US with the majority of our activity in Minnesota, Wisconsin, Iowa, Illinois, North Dakota, South Dakota, and Washington.

Robert Kroening is currently the president of Medical Gas Systems, Inc. Bob previously was a mechanical engineering designer for Ellerbe Becket, an international architectural firm, for 17 years. During his time with EB he almost exclusively worked on designing healthcare facility plumbing systems which included medical gas systems. His responsibilities included designing, specifying, and field inspection for all installations. Bob was also a volunteer fire fighter for Stillwater Fire Department. He provided 23 years of service to his community before retiring in 2013.

As president of Medical Gas Systems, Inc., Bob performs consultations with engineers, system inspections, system verification, and medical gas systems training. Bob is highly trained in the field and his credentials are the following:

  • Credentialed Medical Gas Verifier (CMGV)
  • Medical Gas Systems Verifier (ASSE 6030)
  • Medical Gas Systems Inspector (ASSE 6020)
  • Medical Gas Systems Installer (ASSE 6010)
  • Medical Gas Systems Instructor (ASSE 6050)
  • Medical Gas Systems Bulk Verifier (ASSE 6035)

Our Company History

For more information contact: info@dmgs.us

  • Medical Gas Professional Healthcare Organization (MGPHO)
  • National Fire Protection Association (NFPA)
  • American Society of Plumbing Engineer (ASPE)


Medical Gas Systems, Inc. operates as a 3rd party independent testing agency and exclusively performs medical gas system testing and associated activities. Our personnel collaborate with design engineers/planners and work toward the goal of creating a safely controlled and monitored medical gas system. Because we strive to provide the best service, all of our staff members are specialists in medical gas system field. Our specialists are certified by the National Inspection Testing Certification Corporation and Medical Gas Professional Healthcare Organization to the ASSE 6030 Standard and CMGV requirements. For more information on our services, you can contact us at info@dmgs.us.