ARM & HAMMER Adds Two Members to US Ruminant Team

ARM & HAMMER announced today the additions of Brenda Siefken, PMP, and Brad Clyburn, Ph.D., to the Animal and Food Production team as ruminant account managers.

Siefken and Clyburn will focus on supporting and expanding the dairy and beef business in the South Central region of the United States. Based out of Broomfield, Colorado, Siefken will oversee Kansas and Colorado while Clyburn, based in Lipan, Texas, will concentrate on Oklahoma and Texas.

“Brenda and Brad are excellent additions to our team as we strive to serve our customers more effectively,” says Mark Pierce, senior manager south central regional. “Brenda brings an extensive business to business, marketing and project management background and Brad’s experience and education in ruminant nutrition  will be a welcomed addition for our customers.”

Prior to joining ARM & HAMMER, Siefken served as account director and business development consultant for AgCall, where she oversaw customer engagement and client support. Her previous experience also includes marketing special projects manager for Animal Health International, Inc. and several sales management positions with Fort Dodge Animal Health. She is a certified Project Management Professional (PMP) and holds a Bachelor of Science degree in agricultural business and management from Iowa State University. Siefken can be reached by phone at 303-990-3697 or by email at

Clyburn earned a doctorate in ruminant nutrition from Texas Tech University and comes to ARM & HAMMER from Chr. Hansen. His experience includes national account management and technical sales. Prior experience also includes work with DPI Global, Gore Brothers, Inc. and Ghosthollow Consulting in a nutritional and technical sales capacity. Clyburn can be reached by phone at 817-718-6996 or by email at

Arm & Hammer Animal and Food Production, with headquarters in Princeton, N.J., is a worldwide leader in providing the broadest portfolio of nutrition, microbial and food safety solutions and services backed by an unmatched research and development pipeline. To learn more about ARM & HAMMER, visit

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