Kersey, CO

24330 Hwy 34
Greeley, CO 80631


Location Info

The Heart of the Company

Our Kersey site is the original headquarters of Centennial Ag Supply Co. and continues to be the heart of our full service plant health products operation.  In addition to the company’s home office, our fertilizer plant and storage facilities and our new products testing center are all located in Kersey. 

Our goal is to be the best at providing you with a quality product and superior service, designed to help you maximize your return on your time and money.  To help you accomplish that, our extensive staff of seasoned agronomists, experienced applicators and other field staff are ready to assist you whether you’re in the planning season, the planting season, or the growing season.  

Quality, service, expertise:  That’s our promise to you.


Eric Johnson, Eastern Regional Manager

As Eastern Regional Manager, Eric leads our operations team in the areas of application and delivery at our locations in northeastern Colorado and southwest Nebraska. His hands on experience, attention to detail, and leadership skills bring a high level of service excellence to our grower’s farms. Eric trains our staff in the field as well as the classroom in the areas of professional application and customer experience. Eric is known for his dedication to the surrounding community. Eric is the sole recipient of Centennial Ag Supply Co.'s "Hero Award," in honor of his high level of integrity and commitment to our company. Eric was recognized with this award appreciating all he does for his team and the growers in the community.

Dan Malpiede

Dan Malpiede, General Manager Kersey

Dan recently rejoined Centennial Ag Supply in August of 2015. He now serves as the Director of both Transportation and Industrial Divisions. Dan brings a broad spectrum of valuable work experience in a variety of areas to our team here at Centennial Ag Supply Co. Farming, ranching, construction, retail fertilizer operations, petroleum, and trucking are all areas Dan has excelled in throughout his career. Dan actually worked with our operations staff as an applicator and CDL driver back in the 1980’s. His most recent past experience as General Manager of a 200 unit trucking company has provided Dan with the skillset to further increase our transportation efficiency and the level of service we offer in the area of customer logistics. Dan’s natural leadership abilities and intense focus on providing excellent customer service with a smile are a welcome addition to our team.

Brian Grasmick

Brian Grasmick, Field Representative

Brian is a Crop Advisor with over 20 years of experience in the agriculture industry. He is a University of Wyoming graduate with a Bachelor of Science in Agronomy. Brian holds a Qualified Supervisor License (QS) through the Colorado Department of Agriculture. His passion for improving crop production and protection for all of his customers is a daily focus and he uses it to the benefit of his growers.

Steve Krosky

Steve Krosky, Field Representative

Steve has a passion for crop production. As a native Coloradoan, he knows this region’s climate and challenges. Steve is a graduate of Colorado State University with a Bachelor of Science degree in Agronomy. With over 32 years of experience in the field of crop production, as a production agronomist, as a crop consultant, and in agronomy sales, he works with growers to help them increase their yields. In his seven years with Centennial Ag Supply Co, Steve enjoys working with growers, and creating strong customer relationships.

John Derosier

John Derosier, Field Representative; Turf & Ornamental and Mountain Divisions

John has been in the landscaping, lawn care and land use management industry for over twenty years with five of those years here at Centennial Ag Supply Co. John has a Bachelor of Science from Colorado State University in Natural Resource Management. He is a proud supporter of several organizations including Rocky Mountain Regional Turf Grass Association (RMRTA), International Society of Arborists (ISA), Rocky Mountain Agribusiness Association (RMAA), and Colorado Weed Management Association (CWMA). John specializes in Turf grass and trees as well as grass hay and alfalfa production. 

Derek Heckman

Derek Heckman, Field Support Representative

Derek was raised on a family farm in McClave, Colorado. He found passion for agriculture by working on the farm and being involved in FFA throughout high school. Derek attended Iowa State University and graduated with a Bachelor of Science Degree in Horticulture. After graduating college, Derek went to work for Ag-leader, an industry recognized precision-ag hardware/software provider. At Ag-Leader he worked with customers setting up variable rate seed and fertilizer applications as well as analyzing field data and troubleshooting software issues. This experience has equipped Derek with a very high level of customer service skills and we are confident that you will find value in working with him on your farm. Derek is excited to be back in Colorado and working with Centennial Ag Supply.

Chris Taggart - Industrial Division Regional Manager

Chris enthusiastically joined Centennial Ag Supply in August of 2016 as Industrial Division Regional Manager. Chris brings to the table over 10 years of Industrial sales experience in a multitude of market segments such as Aerospace, Manufacturing, Biopharma, Metal Fab, Oil and Gas, Refining, Energy, Construction and many others, spanning from the Midwest to the Intermountain Area. Chris has vast experience with managing a large sales force, operations, and budgeting/P&L responsibilities. Chris’ leadership skills, attention to detail, safety and customer service makes him a great addition to the Centennial AG team.

2013 ERA National Winner