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 Marshfield Labs Staff


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​Sales and ​Marketing

Clinical and Anatomic Pathologists

Clinical​ PhD's​​​

Veterinary Pathologists​




Thomas R. Fritsche, MD, PhD

​​Director, Division of Laboratory Medicine

Pam Carter, MT (ASCP), BS, MBA​

​Administrative Director​

Joyce Flanagan, PhD​

​​​Director, Toxicology​




​​Sales and Marketing​

Shelley Van Proosdy, Strategic Sales Executive

Responsible for clinical diagnostic, veterinary diagnostic and veterinary research business development and sales

Dustin Buse, Account Service Representative

Responsible for day to day activities of our clinical diagnostic clients

Damon DeMichele, Account Executive

Responsible for veterinary sales in Michigan

Nicole LeTourneau, Account Executive

Responsible for veterinary sales in Minnesota and Western Wisconsin

Joey Liebmann, Account Executive

Responsible for veterinary sales in Central and Eastern Wisconsin, UP of Michigan and Northern Illinois​


​Clinical and Anatomic Pathologists

Deepa Bassi, MD

​Special Interests:

  • Gynecologic
  • Breast
  • Renal pathology

Efstathio​s Beltaos, MD

Special Interests:

  • Lung
  • Kidney
  • Lymph nodes
  • Breast

Jonathan Cutlan, MD

Special Interests:

  • Melanoma
  • Melanocytic lesions
  • Cutaneous lymphoma

Thomas Fritsche, MD, PhD​

Special Interests:

  • Antimicrobial Resistance andSusceptibility Testing Methodologies
  • Laboratory Detection of Bacteremia and Fungemia
  • Laboratory Standards and Quality Control
  • Medical Microbiology
  • Molecular Diagnostics
  • Parasitology
  • Clinical Pathology
  • Infection Control
  • Tick-borne Diseases

Lei Hao, MD​

Special Interests:

David Seung Lae Kim MD, PhD​

Special Interests:

  • ​​Melanocytic lesions
  • Inflammatory disease
  • Skin neoplasms​

Rafael Medina-Flores MD​

Special Interests:

  • Neuro-oncology
  • HIV dementia
  • Neuromuscular pathology​

Thanhcuong Nguyen, MD​

Special Interests:

  • Surgical pathology
  • Cytopathology​

Kathy Puca, MD​

Special Interests:

  • ​​Transfusion Medicine
  • Coagulation

Jeffrey Resnick, MD

Special Interests:

  • Gastrointestinal/liver pathology
  • Cytopathology
  • Dermatopathology

Syed Sajjad, MD​

Special Interests​:

  • Tumor pathology
  • Electron Microscopy
  • Renal pathology including renal transplant pathology

Lindsay Schmidt MD​

​Special Interests:

  • Pulmonary pathology

Gene Shaw, MD​

Special Interests​:

  • Coagulation
  • Flow Cytometry
  • Hematology and Immunology

Kajal Sitwala, MD, PhD​

Special Interests​:

  • Leukemia/lymphoma
  • Flow cytometry
  • Molecular diagnostics​

Yeping Sun MD, PhD

Special Interests:

  • Diagnostic surgical pathology
  • Hepatic and gastrointestinal pathology
  • Immunohistochemistry

Chris Waldo, MD

​Special Interests:

  • ​Anatomic pathology
  • Outreach pathology​​

  ​      ​                                       


Clinical ​​​PhDs

Sarah Bissonette, PhD

​Special Interests:

  • Maternal fetal medicine
  • Automated chemistry
  • Point of Care testing


Joyce Flanagan, PhD

Special Interests:

  • Toxicology
  • Therapeutic drug monitoring
  • Clinical applications by mass spectrometry
  • Protein electrophoresis
  • Endocrine and autoimmune diseases

​​Thomas Novicki, PhD

Special Interests:

  • Tick-borne diseases
  • Diagnosis of TB

Timothy Uphoff, PhD​

Special Interests:

  • Molecular Diagnostics
  • Infectious Diseases
  • Genetics
  • Oncology


Veterinary Pathologists​

Jennifer L. Brazzell, DVM, MVetSC, ​MRCVS, MPH, Diplomate ACVP

​Special Interests:​

  • Consultation with Investigators on Study Design
  • Hematopathology and Bone Marrow Examination
  • Histology and Cytology of Study Animals
  • Infectious Diseases and Microbiology
  • Review, Interpretation and Summary of Clinical Laboratory Data in Investigational Settings
  • Research Study Pathology

Matthew R. Feirer, DVM, Diplomate ACVP

Special Interests:

  • Assay Development
  • Hematology
  • Immunohistochemistry/Immunocytochemistry
  • Cytology

Robert Foster, BVSc, PhD, MANZVCS, Diplomate ACVP

Special Interests:

  • General Diagnostic Pathology
  • Repropductive Pathology
  • Oncologic Pathology
  • Dermatopathology

​John M. Gliatto, DVM, PhD, Diplomate ACVP

Special Interests:

  • General Diagnostic Pathology
  • Oncologic Pathology
  • Renal Pathology

Michael H. Goldschmidt, MSc, BVMS, FRCVS, Diplomate ACVP​

Special Interests:

  • General Diagnostic Pathology
  • Dermatopathology
  • Oncologic Pathology
  • Canine and Feline Mammary Neoplasms

​Barbara Greig, DVM, MPH​, Diplomate ACVP

​​​Special Interests:

  • Clinical Chemistry
  • Infectious Disease and Microbiology
  • Public Health/Infectious Disease Epidemiology
  • General Diagnostic Hematology and Cytology

Ashley Leisering, DACVP, MS, Dilpomate ACVP

​​Special Interests:

  • Diagnostic Clinical Pathology

Joseph P. McCoy, DVM, ​​​Diplomate ACVP

Special Interests:

  • Camelid Pathology
  • Hematology and Cytology
  • Ocular Pathology
  • Ruminant Pathology
  • General Diagnostic Pathology

F. Yvonne Schulman, DVM, Diplomate ACVP​

Special Interests:

  • General Diagnostic Pathology
  • Oncology
  • Special Oncology
  • Exotic/Zoo Animal Pathology

Laura A. Snyder, DVM, Diplomate ACVP

Special Interests:

  • Bone Marrow and Hematopathology
  • Immunophenotyping
  • Quality Control
  • General Diagnostic and Cytology

Theresa Taylor, DVM, MPH, Diplomate ACVP​

​Special Interests:

  • General Diagnostic Pathology
  • Infectious Disease Epidemiology
  • Public Health

Laura Ann Wennerdahl, DVM, Diplomate ACVP

Special Interests:

  • General Diagnostic Pathology

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​​Call Us 715-221-6278