Rosier Ag Service

Rosier Ag:
We Succeed Only When You Succeed

When you’re looking for the best products, outstanding services, and superior agronomics, choose Rosier Ag.


The Rosier Ag Service Story

Rosier Ag Service was founded in 1991 by Kirby Rosier, who recently received a 30-year service award from Pioneer. Today, Kirby and his sons, Dylan, Cole, and Gage, have built a reputation for finding what works best for every customer.

The Rosiers’ farm is a family business, too. “I’m the fourth generation on the farm,” says Dylan. “We use Pioneer seed and we wouldn’t sell it if we didn’t think it was the best choice, year in and year out.”

Customers appreciate Rosier Ag Service for their personal attention to the success of each operation. These relationships have helped the agency thrive for three decades.

Rosier Ag Service stays active in the community, supporting numerous school and educational activities.

Meet the Rosier Team

Kirby Rosier
Kirby Rosier



Dylan Rosier
Dylan Rosier

Associate Representative


Jeremy Sitherwood
Jeremy Sitherwood

Associate Representative


Pioneer Sales Representatives
in Northwestern Missouri

We’re located just outside Mound City.

Rosier Ag Is Here for You

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