Staff Bios

Tom Tucker

tt@jpsi.com

Tom Tucker is the president of JSA and works out of the San Antonio office, which he opened in 1989. He holds a B.S. degree in finance and economics and a master's degree in international management.

Tom began his career with Continental Grain Company, initially buying truck

Doug Schultz

dschultz@jpsi.com

Doug Schultz is chief operating officer of JSA and is located in the St Joseph, Missouri office, which he opened in 1998. He grew up on the family farm in Illinois and earned a B.S. degree in agricultural economics.

Doug began his career as a commodity trader

Mike “Rocky” Rokala

rocky@jpsi.com

Mike "Rocky" Rokala joined John Stewart and Associates in 2007 to open a branch office. He grew up on the family farm in Minnesota and earned a degree in agriculture business administration from the University of Minnesota. He has many years of experience as a senior grain trader in the

Brian Burke

bburke@jpsi.com

Brian Burke joined JSA in 2011 and opened the St. Louis Branch. Brian graduated with a bachelor’s degree in marketing and management from Southern Illinois University.  His experience in the agriculture business has focused on risk management for grains, oilseeds, and renewable energy products.

Brian started

Brent Baker

bbaker@jpsi.com

Brent Baker opened JSA St. Louis branch in 2011, which he founded with Brian Burke.  Brent has been involved with agriculture his entire life, growing up on a grain farm in southern Illinois where he still farms today. He graduated from the University of Illinois

Gunnar Klish

gunnar@jpsi.com

Gunnar Klish joined John Stewart and Associates in February of 2014, and opened the Chicago branch office. Gunnar has been involved in the agricultural industry for over 30 years. Early in his career he was employed at the Quaker Oats Company. In 1986, he began working at the Chicago Board of Trade

Bart Baker

Bart Baker joined John Stewart and Associates in September 2016, as part of the St. Louis branch. Bart has been involved in the agricultural industry since his graduation from the University of Illinois. Bart was a partner in a southern Illinois grain and livestock farm after graduation.He then moved

Karen Schultz

kschultz@jpsi.com

Karen Schultz joined John Stewart and Associates in 2002 in the St. Joseph, Missouri office. Karen has a business degree from Emporia State and a B.S. degree from Kansas State in milling science. 

From 1986 to 1996, Karen worked as a grain merchandiser/buyer at Scoular,