Dairy Advisors

Building relationships that result in partnerships

Diamond V Dairy Advisors are committed to sharing knowledge and adding value to meet dairy customers’ needs and objectives. These Diamond V team members are your Trusted Experts in Nutrition and Health™ worldwide.



Curtis Harms, D.V.M.
Curtis Harms, D.V.M.
Diamond V Regional Director, North America


Darin Henry, D.V.M., M.B.A.
Darin Henry, D.V.M., M.B.A.
Global Market Access and Demand Generation Director


Bill Stone, Ph.D., D.V.M.
Bill Stone, Ph.D., D.V.M.
Director, Ruminant Technical Services


Devin Hanson, Ph.D.
Devin Hanson, Ph.D.
Ruminant Strategic Technical Business Director


Ilkyu Yoon, Ph.D.
Ilkyu Yoon, Ph.D.
Director, Global Ruminant Research & Technical Support


Chad Davis
Chad Davis
Director North America Ruminant Dairy Business


Tom Edrington, Ph.D.

Tom Edrington, Ph.D.

Ruminant Technical Specialist — Field Research and Food Safety


Sam Barringer, DVM
Sam Barringer, D.V.M.
Ruminant Technical Services Specialist


Todd Birkle, D.V.M.
Todd Birkle, D.V.M.
Ruminant Field Technical Specialist


Julia Hamann, D.V.M.
Julia Hamann, D.V.M.
Ruminant Field Technical Specialist


Miles Huffaker
Miles Huffaker
Director, Market Access – Dairy


Kevin Leahy, Ph.D.
Kevin Leahy, Ph.D.
Technical Service Specialist


Preston Morris, D.V.M.
Preston Morris, D.V.M.
Technical Services Specialist


Sam Mosley, Ph.D.
Sam Mosley, Ph.D.
Field Technical Specialist


Tom Oelberg, Ph.D.
Tom Oelberg, Ph.D.
Field Technical Specialist – South Dakota, North Dakota, Minnesota, Nebraska, Montana, Wymoning, Western Iowa


Dave Ohman, D.V.M.
Dave Ohman, D.V.M.
Technical Service Specialist


Jana Powell, D.V.M.
Jana Powell, D.V.M.
Ruminant Field Technical Specialist


Gavin Staley, D.V.M., M.S.
Gavin Staley, D.V.M., M.S., dipl, ACT
Field Technical Specialist


Mark Tegeler, M.S.
Mark Tegeler, M.S.
Field Technical Specialist – Illinois, Indiana, Missouri, Eastern Iowa


Travis Thayer, D.V.M.
Travis Thayer, D.V.M.
Technical Trainer


Nik Ver Steeg
Nik Ver Steeg
Ruminant Field Technical Specialist