Sales Management Team

Eric Sherwood

National Sales Manager

Eric is responsible for the growth and development of the Ag Spectrum independent associate network who bring the Maximum Farming System to the farm. He came to Ag Spectrum in 2009 after serving as a regional manager for Precision Plant­ing, where he led dealer recruitment and sales for 250 dealers in 27 western states. Previously, he worked 13 years with Farmland Industries and as a private consultant to ag retailers. Eric was raised on a diverse crop and livestock operation.  He holds a bachelor’s degree in Ag Economics from the Universi­ty of Missouri. He resides in Platte City, Missouri with his wife.

Erik Larson

District Manager

Erik received his bachelor’s degree in Agricultural Science from Northwest Missouri State University. He has worked in agricultural sales and management for his entire career. He worked for Syngenta as a seed representative for the Golden Harvest brand. Erik worked as national sales manager of the Brodbeck seed brand for Dow AgroSciences. He was raised on the family farm near where his family resides in Tipton County, Indiana. Erik and his wife have two children. They raise cattle, on a small scale, for 4H projects and have a Club calf herd. He judges 4H shows and is also a professional livestock judge for cattle, sheep, and pigs for open shows, county, and state fairs. With more than 20 years of experience providing sales support and management to growers and sales representatives, Erik is equipped to lead Associates and encourage the implementation of the Maximum Farming System.

Andy Paston

District Manager

Andy serves as a District Manager for Ag Spectrum in Ohio and surrounding areas, and leads our Associates in promoting the Maximum Farming System.  Andy came from AgReliant Genetics where he served as the Regional Team Leader, managing six district sales managers in Ohio for the Great Lakes Hybrids brand.  Prior to working with AgReliant Genetics, Andy served in various sales and agronomy roles with Monsanto and Syngenta working with the seed & trait, crop protection, and seed care business units.  Andy has a lengthy background in production agriculture, from his own farm, to serving as the crop protection manager for a 10,000+ acre row crop operation in central Ohio. He holds a bachelor’s degree in crop science from The Ohio State University, and was a Certified Crop Adviser through 2015.

Mitch Sivertson

District Manager

Mitch attended North Dakota State College of Science and the University of Mary. He has held sales, agronomy, and sales management positions with several ag and seed companies mentoring new employees and making recommendations regarding chemicals and seeds tailored to each client's need. He worked as the District Sales Manager for Proseed, Prairie Brand Seed, and then for Pinnacle Agriculture. Mitch has 20 years of experience providing agronomic and sales support to farmers and sales representatives. As a District Manager for Ag Spectrum, Mitch is equipped to lead Associates by educating them about the Maximum Farming System. 

Pat Tomlinson

District Manager

A native of central Illinois, Pat grew up on a crop and livestock farm near Macon. He attended the University of Illinois at Urbana-Champaign, where he earned a Bachelor of Science in Agricultural Economics with a concentration in both Farm Management and Agricultural Marketing. After college, Pat entered the seed industry, first working for a small family seed company in Sullivan, IL. A year later, beginning a 37-year career with Pioneer Hi-Bred, which later became DuPont Pioneer.  For most of those years, Pat was a District Sales Manager leading a team of independent sales representatives in central Illinois, and also working directly with farmers.  When Pioneer was purchased by DuPont, he had dual responsibilities for marketing and servicing both seed through independent sales representatives, and crop protection products through ag retailers. In 2009, Pat accepted a key account role working with professional farm managers in the eastern U.S. with a primary focus on Illinois and Indiana.  He built many strong relationships among these customers.  After leaving DuPont Pioneer and joining Ag Spectrum as District Manager, he was awarded the 2017 "Service to Agriculture" award by the Illinois Society of Professional Farm Managers and Rural Appraisers (ISPFMRA).  Pat resides near Mt. Zion, IL with his wife. Most of his personal time is focused on the family farm, with which he continues to be involved, and on spending time with his family, including grandchildren.

Greg Vincent

District Manager

Greg joined the Ag Spectrum team to provide leadership and support for Area Managers and Associates. Prior to joining Ag Spectrum, Greg was editor of Ag Web, the website division of Farm Journal Media. He first joined the group as editor of their magazine, Top Producer, in 2007. Greg’s passion for serving agriculture began at a young age while accompanying his father (a writer for Successful Farming magazine) on business trips where he experienced various types of agriculture. Growing up, Greg worked on his uncle’s farm in southeastern Iowa during the summer months before earning a degree in Agriculture Journalism from Iowa State University. He began his career working in ag marketing with advertising agencies and is the former editor of Dealer & Applicator, a magazine for fertilizer and chemical retailers.

Rob Vincent

District Manager

Rob joined the Ag Spectrum team as a District Manager after working with Pioneer Hi-Bred International, Inc. for 6 years as both a farm manager coordinator and an account manager. Rob received a bachelor's degree in Agriculture from Iowa State University and his MBA from the University of Iowa. He is active as a Polk County Fair board member. He served the Iowa 4-H foundation as a board member from 2012 to 2018. Rob and his family are also very active in the meat goat industry in Iowa. He served as the President of the Iowa Meat Goat Association from 2013 to 2014. With more than 30 years of relationship-based sales and management experience, Rob provides valuable support to Ag Spectrum's Area Managers and Associates.