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Employees header image

The BioDiagnostics Team

BioDiagnostics is proud to offer the expertise of its knowledgeable, experienced staff, which has 120 years of cumulative industry-based seed-testing experience.

Our leadership and top-level management team continuously seek to support the success of your business and to advance the industry.

Our Leadership

Quentin Schultz

Quentin Schultz

Owner and President; Registered Seed Technologist (RST)

  • Founded BDI in 1996
  • B.S. and M.S. from South Dakota State University
  • Quentin’s career includes 20 years of seed management as quality assurance manager with Pfizer Genetics, Jacques Seed Company, Agrigenetics and Mycogen Seeds. He has held the position of assistant professor at South Dakota State University.

Craig Nelson

Craig Nelson

Vice President and Manager of Electrophoresis Technologies, Sales & Marketing, Administration and Safety; Certified Crop Advisor (CCA)

  • Joined BDI in 2002
  • B.S. in Agricultural Economics from Purdue University
  • M.S. in Agronomy from University of Kentucky
  • Craig’s career includes management positions within quality assurance and various agronomy positions at Agrigenetics and Mycogen Seeds.

Denise Thiede

Denise Thiede

Vice President and Manager of Analytical Chemistry, ELISA and Standard Seed Testing Labs; Quality Management Representative; Registered Genetic Technologist (RGT)

  • Joined BDI in 2002
  • B.S. from St. Olaf College
  • M.S. from University of Illinois
  • Ph.D. in Evolutionary Plant Biology from Michigan State University
  • Denise’s career includes positions at Michigan State University; University of California, Davis; University of Pittsburgh; University of Illinois; and St. Olaf College.

Carol Betzel

Carol Betzel

Manager, Electrophoresis Technologies; Registered Genetic Technologist (RGT)

  • Joined BDI in 1996
  • Studied Chemistry and Mathematics, University of Wisconsin, River Falls
  • Carol’s career includes experience as Electrophoresis Lab Supervisor at Jacques/Mycogen Seeds.

Farhad Ghavami

Farhad Ghavami

Manager, Molecular Breeding and Genomics Technology

  • Joined BDI in 2013
  • MSc. from Isfahan University of Technology, Isfahan, Iran
  • BSc. and Ph.D. in Plant Molecular Genetics from University of Tehran, Tehran, Iran
  • Farhad’s career includes 9 years of experience working on plant molecular biology, genomics, transcriptomics, quantitative genetics and molecular breeding. He held positions at Simon Fraser University, North Dakota State University and University of Minnesota.

DaNell Jamieson

DaNell Jamieson

Manager, Standard Seed; Registered Genetic Technologist (RGT); Registered Seed Technologist (RST)

  • Joined BDI in 2008
  • A.A.S. University of Minnesota, Crookston
  • B.S. Degree in Agronomy, University of Minnesota, St. Paul
  • M.B.A in Agriculture Business, Aurora University, Illinois
  • DaNell managed the Quality Lab at Cargill Hybrid Seed for 13 years and has 25 years of experience in the seed industry.

Brenda Johnson

Brenda Johnson

Manager, ELISA/Herbicide Bioassay; Registered Genetic Technologist (RGT)

  • Joined BDI in 2003
  • B.S. in Biology Education/Broad-field Science, University of Wisconsin, Eau Claire
  • Brenda’s career includes chemistry and biology teaching positions and a lab position at the U.S. Army Corps of Engineers.

Joe Zalusky

Joe Zalusky

Manager, Analytical Chemistry; AOCS Approved Chemist

  • Joined BDI in 2000
  • B.S. in Biology, Minor in Chemistry, University of Wisconsin, River Falls
  • Joe is a member of the Minnesota Chromatography Forum (MCF) and the AOCS.

Thomas Foust

Thomas Foust

Business/Systems Analyst (IT)

  • Joined BDI in 2012
  • A.S. in Computer Programming, Alexandria Area Technical Institute
  • Tom’s career includes experience in information security, along with several years of extensive work in business/systems analysis and programming, as well as project leadership and team management for several large corporations.

Chondra Carlson

Chondra Carlson

Supervisor I, Molecular Breeding and Genomic Technology

  • Joined BDI in 2008
  • B.S. in Genetics from University of Wisconsin, Madison
  • Chondra’s focus within the MBGT lab is on research and multiplex arrays.

Anna Doornink

Anna Doornink

Supervisor I, DNA QA Laboratory; Registered Genetic Technologist (RGT)

  • Joined BDI in 2005
  • B.S. in Biotechnology from University of Wisconsin, River Falls
  • Anna minored in Biology, Chemistry and Animal Science during her time at the university. She also worked in the Food Microbiology lab.

Marcia Huppert

Marcia Huppert

Supervisor I, Large Seed Lab in Standard Seed Testing

  • Joined BDI in 1997
  • Marcia’s career includes more than 10 years of seed-testing experience in the Quality Assurance Department of Mycogen Seeds.

Kevin Kadidlo

Kevin Kadidlo

Supervisor I, DNA QA Laboratory

  • Joined BDI in 2005
  • B.S. in Medical Technology, University of Wisconsin, Eau Claire
  • Kevin’s career includes 20 years of experience in clinical laboratory science and molecular diagnosis.

Darcey Rodewald

Darcey Rodewald

Supervisor I, Administration

  • Joined BDI in 2001
  • B.S. in History, University of Wisconsin, River Falls
  • Darcey’s career includes 16 years of customer service.

Diandra Viner

Diandra Viner

Supervisor I, Standard Seed Testing; Registered Seed Technologist (RST); CGT (Certified Genetic Technologist); Certified Canadian Seed Grader

  • Joined BDI in 2002
  • B.S. in Agronomy, University of Wisconsin, River Falls
  • Diandra interned at Mycogen Seeds in the Sunflower Breeding Program.

Wendy Zillgitt

Wendy Zillgitt

Supervisor I, Molecular Breeding & Genomics Technology; Registered Genetic Technologist (RGT)

  • Joined BDI in 2001
  • B.S. in Food Science, University of Wisconsin, River Falls