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The MiChEM Program Team

MiChEM is a joint program of the Michigan Department of Health and Human Services’ (MDHHS) Environmental Health Bureau and Bureau of Laboratories. The MiChEM program team includes laboratory scientists, toxicologists, epidemiologists, health educators, community engagement specialists and logistics staff.

The MiChEM team includes:

Matthew Geiger, DrPH, MS

Principal Investigator
Director, Division of Chemistry and Toxicology, Bureau of Laboratories

Elizabeth Wasilevich, PhD, MPH

Principal Investigator
Senior Epidemiologist
Environmental Health Bureau

Jennifer Gray, PhD

Senior Toxicologist
Environmental Health Bureau

Darren Donnelly, MPH

Program Manager
Environmental Health Bureau

Rachel Long, MSPH

Lead Epidemiologist
Environmental Health Bureau

Alexandra Rafalski, PhD, MS

Lead Toxicologist
Environmental Health Bureau

Bianca Winward, MPH

Lead Health Educator
Environmental Health Bureau

Ellery Johnson, MPP

Lead Community Engagement Specialist
Environmental Health Bureau

The MiChEM field staff includes:

Yesenia Grijalva, MPH, MCHES®

Mobile Lab Operations Coordinator
Environmental Health Bureau

Camryn Giem, BS, CHES

Mobile Lab Operations Coordinator
Environmental Health Bureau

Warren Miller

Mobile Lab Operator
Environmental Health Bureau

Vincent Powell

Mobile Lab Operator
Environmental Health Bureau


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If you have questions about the Michigan Chemical Exposure Monitoring (MiChEM) program, call 844-464-7327.