National DHIA Staff

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Jay Mattison

CEO

National DHIA
P.O. Box 930399
Verona, WI 53593 USA
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Steven Sievert

Certification Services

National DHIA
P.O. Box 930399
PO Box 930399
Verona, WI 53593 USA

Steven Sievert

Certification Services

dhia-person-headshot

Kim Hill

Customer Support Specialist -Herd Portal, EarTagCentral

National DHIA
PO Box 930399
Verona, WI 53593 USA

Kim Hill

Customer Support Specialist -Herd Portal, EarTagCentral

dhia-person-headshot

Nicki Knecht

Accounting

National DHIA
PO BOX 930399
VERONA, WI 53593 USA

Nicki Knecht

Accounting

Mary Mattison

Project Manager, HR and Administration

National DHIA
PO Box 930398
Verona, WI 53593 USA

Mary Mattison

Project Manager, HR and Administration

Last Update: 08/20/2026

National Dairy Herd Information Association

P.O. Box 930399
Verona, WI 53593
608-848-milk (6455)

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