Meet The Team

Our Most Important Asset is Our People!

Sales Team


Dean Frees
International Sales Engineer

Dean has been with ValueTronics since 2005 and before that served in the US Army as an electronics repair technician. His travels around the world include Italy, France, Germany, Iraq, Somalia, and Korea. He started working at ValueTronics in the warehouse and then moved into the laboratory as a technician where he worked for over a year before joining the ValueTronics Sales Team in 2007.


Kyle Rapp
Sales Engineer

Kyle is a graduate of DeVry University. He has worked for three major rental companies and has been in the rental industry for over 25 years.Kyle is responsible for the test equipment needs of customers in Northern California (Zip Codes 94-96), Connecticut, Delaware, District of Columbia, Kansas, Idaho, Illinois, Iowa, Maryland, Ohio, Wisconsin, Virginia, Indiana, Louisiana, Kentucky, Colorado, Wyoming and Arkansas.


Dan Karpinski
Sales Engineer

Dan earned his applied science degree in Computer & Electronics Engineering Technology from ITT Tech in 2013. He worked in the electron microscopy field as a field service engineer for 5 years servicing and repairing scanning electron microscopes, focused ion beam systems, and similar high vacuum tools. His main hobby is music, both listening and playing. Dan is responsible for the test equipment needs of customers in Alabama, Florida, Ireland, Michigan, Nebraska, New Hampshire,  Nevada, Tennessee, Texas, New Jersey, New Mexico, Montana, Mississippi, Minnesota, Oklahoma and Pennsylvania.


Jamie Crosby
Sales Engineer

Jamie earned his MBA in management from Mercer University in 2000. Since then he has worked in the test and measurement industry for 15 years.  He has had roles in marketing, account management and business development.  His most recent position was an inside sales rep for the greater Midwest for the past 10 years.  He's worked with customers in aerospace and defense, telecommunications, and power quality industries.  He has a goal to run in a half or full marathon in all 50 states.  So far, he’s completed nine states while running 23 half-marathons and 5 marathons. Jamie is responsible for Southern California (Zip Codes 90-93),  Alaska, Arizona, Georgia, Hawaii, Massachusetts, Missouri, New York, North Carolina, Oregon, Rhode Island, Utah, West Virginia.



John Griffith
President-Managing Director

John is one of the original three founders of ValueTronics 26+ years ago. Before that he earned a Technicians Certificate from DeVry University while working for 17+ years for what is now TRS Rentelco ending his career there as the Inside Sales Manager for the Central Region. He is actively pursuing his Private Pilot license and is an avid General and WWII Aviation enthusiast. When he’s not trying to get off the ground he’s enjoying life with his wife, Cindy, their 8 children and 4 grandchildren (and counting!) at their “Lake House” in Rome, WI. 


Glenn Dulski
Vice President of
Finance & Administration

Glenn came to ValueTronics with over 25 years of accounting/management experience in both the domestic and international service and distribution industries. He acquired his Bachelors of Business Administration Degree from Loyola University and is a Certified Public Accountant.


Harley Stavis
Director of Sales and Marketing

Harley was previously at ValueTronics from 2009 to 2017, and returns to ValueTronics in 2020. Harley has over 20 years in the Test Equipment industry with previous experiences at Agilent(Keysight), Sencore and ConRes Test Equipment..


Lab Team


Peter Kirsch
Sr. Repair Specialist


Steve White
Lab Manager  

Roderick    and    Ken

 Roderick Layug and Ken Hoffman Production Technicians

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Jeff Yesia
Production Technician

Purchasing & Operations

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Lora Rybakowski
Sales Admin

No Photo                                      No Photo                                         Kelly Johnson

Joe Perlongo                        Tony Castrovillari                     Kelly Johnson
New Products Manager     Used Products Manager        Purchasing Assistant     



Laura Ishaya
Accounts Receivable

Marthe Tegtman                  Darlene Minter                                      Rebecca Sanford
Accounts Payable                Customer Service Representative      Marketing       



David Berendsen

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 Vern Gumila