Kevin J. Wiersma

MEDTOX Laboratories, Inc. provides laboratory services for the United States drug testing industry. The company provides workplace drug testing, clinical toxicology, and medical diagnostics, including endocrinology, HIV, and hepatitis testing. It also offers testing services to drug companies and contract research organizations taking drug candidates through clinical trials. The company was founded in 1984 by Dr. Harry McCoy and is located in St. Paul, MN

MEDTOX Scientific, Inc. engages in the operation of forensic and clinical laboratory. It offers medical drug monitoring and pain management, medication-assisted treatment, clinical toxicology and therapeutic drug monitoring, emergency toxicology, biological monitoring and heavy metals, filter paper lead testing, forensic toxicology and employment drug testing, meconium drug testing, synthetic and designer drug testing, and employee wellness programs. The company was founded in September 1986 and is headquartered in Roseville, MN.

Radux Devices LLC develops and markets healthcare devices such as radiation shield that protects physicians from radiation during procedures that require continuous x-ray imaging. The company was founded in 2012 by Greg I. Gordon and is headquartered in Omaha, NE.