Personnel

John M. Provorse - (DER, Structures) President & Founder DER Associates - Mr. Provorse is a Designated Engineering Representative certificate in Structures, DERT-230290. He holds a B.S.M.E. from Oklahoma State University and M.S.M.E. from the Wichita State University. His experience extends over 41 years and includes employment at Beechcraft, Boeing, Cessna, and Learjet.  Mr. Provorse is a licensed private pilot and has been a member of ASME for over 43 years.

Jocy Prochaska - (Configuration Manager / STC/PMA Administrator / Office Manager)                Ms. Prochaska holds a Bachelors of Science degree from Southwestern College specializing in Human Resources and Business.  She has accumulated over 300 hundred credit hours at various colleges and also holds an Associates degree in Accounting from Central Business College.  She has been working in the aircraft industry for over 16 years and handles our Configuration, Office Management requirements, as well as our STC/PMA issues.

William Coatney - (DER, Electrical and Mechanical Systems & Equipment)  Mr. Coatney is an Electrical and Mechanical Systems/Equipment DER.  He has a Bachelors Degree in Engineering from Oklahoma State University, and has an excess of 30 years in the Aviation industry.

Mark Shelly - (DER, Powerplants) Mr. Shelly is an FAA DER in Power Plants for Fuel Systems. Mark has a Bachelors Degree in Mechanical Engineering from LeTourneau College, Longview, TX with 23 years experience working for Boeing and Cessna aircraft. He is also an FAA licensed A&P mechanic and currently holds an FEL Pilot’s License.

Rob Clossin - (DER, Interiors) Mr. Clossin is an Interiors DER with numerous years of experience in the aircraft industry.  He works for DER Associates on an as needed basis, and is currently working for Raytheon Aircraft.

Kim Farabee - (DER, Mechanical Systems & Equipment) Mr. Farabee is an FAA DER in Mechanical Systems/Equipment.  He is President of Kim Tee's Aerospace Engineering and he has numerous years of experience in the aircraft field.  He is currently working for Raytheon Aircraft.

Fred Farthing - Mr. Farthing has over 40 years experience in the aircraft field, and currently holds an FAA A&P License.

Douglas Foster - (Drafter/Engineer) Mr. Foster is a designer with SolidWorks, CATIA, Unigraphics, and AutoCad.  He holds a Bachelors Degree in Aerospace Engineering from Wichita State University and has more than 13 years experience in aircraft structural design.

Ron Neufeld - (DER, Powerplants) Mr. Neufeld is a DER in Powerplant Installation.  He attended college at Wichita State University and has over 35 years of experience in the aviation industry.

Terry Reddout - (DER, Powerplants) Mr. Reddout is contracted with DER Associates on an as needed basis, and is currently working for Bombardier Aerospace.

David Richards - (DER, Systems & Equipment - Helicopters) Mr. Richards works with DER Associates to assist us with any electrical/systems issues that may arise dealing with helicopters.  He has many years experience in the aircraft and helicopter business and is very knowledgeable in his field.

Jim Ritter - (Engineer) Mr. Ritter is a stress analyst with a Masters Degree in Aeronautical Engineering with 19 years experience in Aviation.  Jim analyzes drawings used for design, modification and/or repair of aircraft structures using finite elements and traditional methods to assure that the drawings can be used to find compliance.  He writes stress reports and is a valuable member of our team.

Russell Royal - (DER, Structures) Mr. Royal holds a Bachelors Degree in Aeronautical Engineering from Parks College in St. Louis, MO and he has over 28 years of aircraft experience, he is currently on contract with Spirit Aerosystems in Wichita.

Wayne Stout - (DER, Mechanical Systems) Mr. Stout has a BS in Mechanical Engineering from SD School of Mines & Technology, a MS in Aeronautical Engineering from Wichita State University, a Ph.D in Engineering from Wichita State University and is a licensed PE in the state of Kansas.  He is a professional engineering specialist/manager/DER with a combined 22 years analysis, design and management experience in aircraft thermal, pneumatic, hydraulic, mechanical and flight control systems.

Bennett Sorenson - (DER, Flight Analyst/Pilot) Mr. Sorenson has a BS in Aeronautical Engineering from Rensselaer Polytechnic Institute, an MS in Systems Management from Southern California, was Aerospace Engineering and Flight Test Pilot for the Air Force and Federal Aviation Administration for numerous years.  He has over 35 years of overall aircraft experience and 29 years as an Airline Transport Pilot.

Bobby Weniger - (DER, Systems and Equipment) Mr. Weniger works with DER Associates continuously to provide us with Electrical Systems and Equipment coverage on aircraft.  He has numerous years of experience in the aircraft industry, and is currently working for Bombardier, Tucson.

John Wiginton - (DER, Systems and Equipment) Mr. Wiginton has 27 years of aircraft engineering experience, and holds a private pilots license.  He is currently working as a private consultant, and has worked previously for Learjet as an engineer for over 13 years and before that with Sikorsky on the S-76 Helicopter for 5 years.