Meet the Team
President & CEO
Mike became the President and CEO of Calcium Products in 2013. Prior to this role, he spent 24 years with John Deere holding positions in engineering, operations, and business. Mike most recently led John Deere’s North American utility tractor business in Augusta, Georgia. He also spent three years in the Netherlands leading John Deere’s European sprayer business and helped secure double-digit growth.
Mike is an Iowa native with experience on his family’s farm. Mike earned an M.B.A. from the University of Chicago in 2002 and a B.S. in Mechanical Engineering from Iowa State University in 1989. Mike and his family live in Ames, Iowa.
Brent Van Ee
Brent brought 19 years of financial experience with him when he joined Calcium Products in 2014. Previously, he worked as a controller for Siegwerk and as a financial consultant at Robert Half Management Resources. He spent six years in financial positions of increasing responsibility at Oldcastle, a manufacturer and distributor of building products, leaving in 2012 as the Midwest Region CFO. Brent’s career started at Koester Construction Company, spending ten years there first as an accountant, then as a systems analyst, and finally as the controller.
He holds a bachelor’s degree in Accounting from Simpson College in Indianola, Iowa. Brent is a native Iowan currently residing in West Des Moines, Iowa.
VP Sales & Marketing
Jeff joined Calcium Products as the Vice President of Sales and Marketing in 2015. Prior to Calcium Products, Jeff developed and grew the Iowa sales territory for Specialty Fertilizer Products (SFP), now Verdesian Life Sciences. He spent ten years at Channel Bio starting first as a district sales manager which led to leadership roles managing all aspects of a sales system including recruitment and coaching of the sales team, marketing, customer service, and distribution. Jeff started his career at FC Coop, now Landus Cooperative in Iowa in 1996 as a feed and livestock marketing specialist.
Jeff has a bachelor’s degree in Agriculture Education from Iowa State University and is an active member of his family farm near Winterset, Iowa.
Andrew Hoiberg, Ph.D.
VP Research & Development
Andrew joined Calcium Products in 2012 after completing his Ph.D. in Horticulture/Soil Science at Iowa State University. Since joining Calcium Products, Andrew has become a recognized expert in the field of soil pH, liming, and sulfur fertility on row crop production in the Midwest. He oversees all aspects of internal and external research, product improvement and development, consultation, technical sales support and training, and variable rate product integration for dealers.
Prior to graduate school, Andrew served as one of the turf managers for the Denver Broncos at Mile High Stadium. He is a native Iowan and currently resides in Ames, Iowa.
Leading our production team is Greg Walstrom, plant manager at Gilmore City. Greg has been with Calcium Products since 2003 and works every day to ensure our operations team works safely, manufactures products to quality specifications, and manufacturers enough product to meet our customers’ growing demand.
Territory Sales Manager | Iowa
Jeff joined Calcium Products in 2012 with an extensive history in agricultural sales including fertilizer, seed, and equipment. Most recently, Jeff worked as a district sales manager in Iowa for Nachurs-Alpine Solutions, an industry leader in nitrogen, phosphorus, and potassium liquid fertilizer. Jeff started his career and spent 17 years with American Cyanamid Co., contributing to the company’s aggressive growth in crop protection products.
Jeff graduated from Iowa State University in 1981 with a bachelor’s degree in Agricultural Business. He was raised on a farm in western Iowa and currently lives in Des Moines, Iowa.
Territory Sales Manager | Iowa Key Accounts
Denna joined the Calcium Products team in 2018 and is responsible for key accounts in Iowa. She brings ten years of sales experience to the team, ranging from seed sales to chemical sales. She has also worked at various agriculture companies throughout her professional career, the most recent being DOW AgroSciences as a Mycogen seed sales representative.
Denna graduated from Iowa State University with a bachelor’s degree in Agricultural Business in 2002. She grew up on a farm near Ames, Iowa and currently resides in Johnston, Iowa with her family.
Territory Sales Manager | Nebraska & Kansas
Brian Easland came to Calcium Products in 2017 with more than 20 years of ag sales and marketing experience collaborating with growers, retailers, consultants, and distributors. He supports our customers in Nebraska and Kansas. He recently managed his own crop consulting business and also worked with Syngenta Crop Protection in northeast Nebraska for nine years. He worked for Agrilliance, now WinField United, for eight years in North Dakota and Nebraska.
Brian earned a degree in Agricultural Business from South Dakota State University in 1994. Brian is an avid outdoorsman and enjoys sports and attending his kids’ activities. He lives with his family near Norfolk, Nebraska.
Territory Sales Manager | Minnesota & Canada
Ritchie Schaefer joined the Calcium Products team in 2017 to support sales in Minnesota. He started his career working six years in ag retail as a precision ag specialist and agronomist for Crystal Valley Coop in Minnesota. He most recently worked as an account manager for Aglytix, a small precision ag software company in Mankato, Minnesota.
He graduated from North Dakota State University in 2010. Ritchie is active in his community of Mankato, including serving as a board member for his county Farm Bureau. Ritchie is passionate about his work and also enjoys hunting and fishing.
Territory Sales Manager | Southern Illinois, Missouri & Professional Turf
John has been with Calcium Products since 2014 and is responsible for the company’s sales in southern Illinois and Missouri. John has a wide array of experiences in ag sales and operations. He joined us after working for various agriculture retail businesses selling crop production inputs and crop insurance. John spent the first 29 years of his career with GROWMARK member companies as a crop specialist and sales and marketing manager.
He grew up on a dairy farm in southern Wisconsin and graduated with his bachelor’s degree in Agricultural Business from the University of Wisconsin-Platteville. He currently lives in Okawville, Illinois.
Territory Sales Manager | South Dakota & North Dakota
Mikel Scholten joined Calcium Products in 2017 and is responsible for North and South Dakota. Mikel has worked in the sales industry for 15 years, with experience ranging from the medical field to the agriculture industry. Previously, she specialized in sales and support of inoculants and in-furrow seed treatments for Rosen’s Diversified Inc.
Mikel graduated from Northern State University in 1999 with a degree in Biology and minors in Chemistry and Psychology. In 2003, she received her MBA and a MM from the University of Mary. Mikel grew up on a row crop and livestock farm in South Dakota and resides with her family in Sioux Falls, South Dakota.
Territory Sales Manager | Wisconsin
Dena graduated from the University of Wisconsin-River Falls with a bachelor’s degree in Horticulture in 2009. Dena is bringing 12 years of agronomy experience to our team with strengths in agronomy sales and independent crop consulting. She has worked at various agriculture companies throughout her professional career, the most recent ones being Synergy Cooperative and Crop IMS (A division of Growmark FS). In her free time, she enjoys hanging out with her family and spending time sailing.
Dena grew up on an organic dairy farm near Baldwin, Wisconsin and currently resides in Glenwood City, Wisconsin with her husband and two children.
Territory Sales Manager | Iowa
Shelby Eastlund joined the Calcium Products team in September 2022 to support sales in Eastern Iowa. She has spent the last ten years with Corteva selling crop protection in parts of Iowa and Missouri.
Shelby graduated from Iowa State University with a degree in Agriculture Studies and a minor in Agronomy. She currently resides with her husband and two-year-old son in Boone, Iowa.
Territory Sales Manager | Illinois
Brett Meador currently lives in Lanark, Illinois and joined our team as our new Northern Illinois Territory Sales Manager in 2023. Brett graduated from Iowa State University with a bachelor’s degree in Agronomy. He previously worked as a precision agriculture and crop specialist.
In his free time, Brett enjoys hunting, farming, and cheering on the Iowa State Cyclones.
Territory Sales Manager | Minnesota
Seth Kveno is coming to Calcium Products with many years of experience in the seed industry. He has joined our sales team as an additional Territory Sales Manager in Minnesota. Seth graduated from NDSU with a bachelors degree in in crop and weed sciences and a bachelors degree in plant protection.
In his free time, Seth likes to watch his kids compete in their various activities, hunt and do a little farming. Seth currently resides in New Ulm, Minnesota.
Technical Sales Agronomist
Glen started with Calcium Products in 2008, bringing with him a wealth of experience and knowledge in row crop production. He supports customers across our sales territories providing agronomic consultation and technical product training. Prior to becoming a part of the Calcium Products team, Glen worked in ag retail for about five years as a sales agronomist, location manager, and agronomy manager.
Glen holds two degrees in Agronomy. He graduated from Iowa State University with his bachelor’s in 1993 and completed his master’s in 2013. He is also a Certified Crop Adviser (CCA) and Certified Professional Agronomist (CPAg).
Marketing Communications Coordinator
Lacey joined the Calcium Products team as a sales and marketing intern in 2017. Upon graduating from Iowa State University in 2017 with a degree in Agricultural Communications, Lacey was hired on full-time.
She grew up on a farm in central Iowa and now farms with her husband near Gowrie, Iowa.
Customer Service Team
Sales Entry Coordinator
Laurie joined the Calcium Products team in 2022. She graduated from DMACC and Northwest Missouri State and works out of the Ames office on order entry and billing. Laurie currently lives in Story City, Iowa and enjoys spending time with her family and cheering on the Iowa State Cyclones.
Patty has been with Calcium Products since 2022. She graduated from William Penn University and has taken over as our logistics coordinator. Patty can be found sourcing trucks and rail cars out of the office in Ames. In her free Patty enjoys going off-roading with Jeeps, crafting, and visiting wineries. Patty currently resides in Ames, Iowa.
Accounting Clerk – Billing Specialist
Melissa started with Calcium Products in 2022. She graduated from William Penn University and can be found in the Ames office working on billing. In her free time, she enjoys reading, gardening and fishing. Melissa currently resides in Ames, Iowa.
Join the Calcium Products Team
Do you have skills and experience that you think would be a good addition to our team?