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Contact Us                                                          info-novasource@tkinet.com
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TECHNICAL SUPPORT 

Kurt Volker, Ph.D.
Director of Development
Phone: 509.952.9878
kvolker@tkinet.com 

 

 CUSTOMER SERVICE

TKI Customer Service
Phone: 800.525.2803

OrderEntry@tkinet.com

 

 
​Regional Managers - North America
 
Northwest
James Owens
Phone:  509.430.4098
jowens@tkinet.com
 
and
 
Kyle Coleman
Phone: 509.430.2299
 
 
Southeast
John (Donnie) Wadsworth
Phone: 256.234.3386
dwadsworth@tkinet.com
  
 
 
 
 
Midwest & Northeast
Bob Gestring
Phone: 515.201.2649
bgestring@tkinet.com
 
Southwest 
Rod Hallam
Phone: 916.218.9559
rhallam@tkinet.com
 
Canada
Bob Gestring
Phone: 515.201.2649
bgestring@tkinet.com
  
 
 
​
Other Staff​
 
David Cassidy
Group Vice President, TKI
Phone: 949.999.0814
dcassidy@tkinet.com
 
Mike DeRiso
Director, Marketing & Business Dev.
Phone:  281.313.2128
mderiso@tkinet.com
 
Pete Barrows
Director, International Business
Phone: 215.630.1990
pbarrows@tkinet.com
  
Tom Justmann
Director, International Business
Phone: 925.890.6936
Brian Thomassen
Regulatory Affairs Manager
Phone: 602.889.8397
bthomassen@tkinet.com
 
Jerry Krebs
Metam Stewardship and Training
Phone:  916.989.4285
jkrebs@tkinet.com
 
 
Jonathan Akins, Ph.D., DABT
Director, Regulatory Affairs
Phone: 602.327.0542
 
John (Donnie) Wadsworth
Director, Sales & Nat'l Accounts
Phone: 256.234.3386
 
Dave Hoppel
Director, Manufacturing
Phone: 602.889.8305
 
Solonia Bass
Business Manager
Phone: 602.889.8302
sbass@tkinet.com
 
Luis Castro
Regulatory Affairs Manager
Phone:  602.889.8414
 

 

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