Leadership Team

Nate Haas, DVM, MS, DACVM

President and Director of Research and Development

As the President of Anpario, Inc., Dr. Haas is involved with all aspects of the company. He is instrumental in developing and overseeing research, communicating animal trial results, and providing expertise within the company to strengthen the Anpario brand, product portfolio and programs. With his extensive knowledge of animal health, he is a key component in presenting technical data to our associated stakeholders. He supports the company with strategic and managerial leadership to help train company and distribution representatives and to assist in deployment of products within animal health programs.

Before joining Anpario, Dr. Haas held positions in food animal veterinary practice, a Clinical Microbiology Residency at the Iowa State University Veterinary Diagnostic Laboratory, teaching positions at Madison College and University of Wisconsin-Madison School of Veterinary Medicine as well as serving as a veterinarian for the State of Wisconsin. He also held a district seat on the Wisconsin Veterinary Medical Association Executive Board of Directors and is board certified in the American College of Veterinary Microbiologists.

Dr. Haas resides in Wisconsin with his wife and four daughters.

He is a 2009 graduate of Iowa State University College of Veterinary Medicine.

Rebecca Wienkes

CAFO

Becky Wienkes joined Anpario in 2015. She has over 30 years of experience working with agriculture and agribusiness clients as a Certified Public Accountant.

Her leadership role at Anpario focuses on leading a strong team, developing and implementing the company’s administrative plan, and ensuring the company’s financial stability.

Becky has been involved in agriculture her entire life-growing up on a 60-head dairy farm. She and her husband currently reside on and operate a beef and crop farm in Southwest Wisconsin.

Dr. Luis Solorzano, Ph.D., Dipl. ACAS

Vice President of Sales for the Americas

As Vice President of Sales for the Americas, Dr. Luis Solorzano, Ph.D., Dipl. ACAS, has made a significant impact across the organization since joining in late 2024 as Director of Applied Research and Technical Services. Through his technical expertise, leadership, and collaborative approach, he has built a strong reputation for supporting colleagues and customers alike. His responsibilities include leveraging his extensive professional network throughout Central and South America, helping strengthen Anpario’s presence in key international markets.

In his role as Vice President of Sales for the Americas reflects his outstanding contributions and extensive experience leading sales teams within the animal nutrition industry, both in the United States and globally. He leads sales strategy and business development efforts across the Americas, supporting Anpario’s continued growth and commitment to customer success.

William A. Zimmer, D.V.M.

Our Founder

Dr. Zimmer’s journey into the world of animal health began with his education and passion for veterinary science. His entrepreneurial spirit led him to establish Bio-Vet in 1991, a company that became synonymous with innovation in the creation and manufacture of animal microbial and nutrition products. Today we expand on the mission set forth by our founder.

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