About Quantum Laboratory

Quantum Laboratory is a minority owned CLIA certified clinical laboratory. Quantum was established in St. Louis, MO in 2019.
Quantum offers toxicology testing services to a variety of industries, including physician offices, employers, government agencies, health clinics, pain management practitioners, and rehabilitation centers.

Our Services

Diverse Testing Options
Quantum Laboratory offers testing for 58 drugs spanning 29 drug classes allowing for personalized care
Verified Accuracy
LC/MS instrumentation, the platinum standard in toxicology, and a professional staff ensure accuracy to the highest accredidation standards.
Compassionate Billing
Quantum Laboratory accommodates patient hardship and works with physicians to limit patient burden

Our Company



Our Leadership

Sylvester Williams
Founder & CEO
Mr. Sylvester Williams, a Denver Broncos defensive Tackle, founded Quantum Laboratory.
Mr. Williams won a Super Bowl with the Denver Broncos before heading to Los Angeles as a free agent.
He is a native of St. Louis, MO and a graduate of Jefferson City high School. Hard work is not something new to Mr. Williams.
During high school, he worked in two different fast-food restaurants and then in a factory for six months before being drafted by the NFL out of the University of North Carolina. Mr. Williams brings his hard-working and family-centered values to Quantum Laboratory.