Meet the Team
Executive
Mike Hogan
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
CFO
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.
Jeff Thompson
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.
Operations
Greg Walstrom
Operations Manager
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.
Sales
Jeff Hoemann
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.
Phone: 515-490-5853
Denna Heyer
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.
Phone: 515-443-4746
Scott Hall
Territory Sales Manager | Northern Illinois & Eastern Iowa
Scott Hall joined our team in 2017 and brought 20 years of agriculture sales and business development experience with him. Scott is responsible for northern Illinois and eastern Iowa. Most recently, Scott worked as a senior technical sales specialist for Bayer Crop Science.
He grew up on a grain and livestock farm in western Illinois and attained a bachelor’s degree in Agronomy from Western Illinois University and an M.B.A. from the University of Iowa. When Scott is not working or spending time with his family, he enjoys boating and fishing in southeast Alaska. Scott and his family reside near Geneseo, Illinois.
Phone: 309-235-8671
Mikel Scholten
Territory Sales Manager | South Dakota & North Dakota
Mikel Scholten joined the Calcium Products team 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. Prior to Calcium Products, 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 Masters of Business Administration and a Masters of Management from the University of Mary. Mikel grew up on a diversified crop and livestock farm in South Dakota and currently resides with her family in Sioux Falls, South Dakota.
Phone: 402-805-7115
Brian Easland
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.
Phone: 402-860-9743
Ritchie Schaefer
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.
Phone: 507-380-0896
John Krueger
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.
Phone: 217-474-3291
Glen Howell
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
Lacey Alliger
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 – Gilmore City
Mary Kiesecker
Customer Service Team
Mary has been with Calcium Products since 2011. You will find Mary in Gilmore City loading trucks and taking orders. Before Calcium Products, Mary was an administrative assistant to a trucking sales department. In her free time, she likes to ride horses, camp, read and do crafts. Mary currently resides in Gilmore City, Iowa.
Toni Frederiksen
Customer Service Team
Toni is the newest member of our customer service team! She began working at our Gilmore City plant in 2018. Previously, Toni has owned a carpet and flooring business and has worked in retail management for 11 years. In her free time, she likes to garden, do crafts, and cook. Toni currently resides in Gilmore City, Iowa.
Customer Service Team – Fort Dodge
Dreux Evans
Customer Service Team
Dreux joined the Calcium Products team in 2015. Dreux is a part of the Fort Dodge customer service team. She spends her days loading trucks, directing phone calls, and doing data entry. In her free time, Dreux likes to spend time with her family, friends, and her dog. During the summer months, you will find her outside enjoying the outdoors. Dreux currently resides in Fort Dodge, Iowa.
Join the Calcium Products Team
Do you have skills and experience that you think would be a good addition to our team?
