DNA Drug Screening Services is a national company that was founded in San Jose, California in 1989 and is owned by Colleen Wienhoff, a nationally recognized expert in drug testing with over 25 years in the industry. Our dedicated staff of friendly professionals is always eager to help our clients.
Of primary focus to us is DOT compliance. Our knowledge of and strict adherence to DOT standards in administering testing programs has situated us as industry leaders and experts.
With over 3000 client companies, DNA Drug Screening Services is California’s most trusted drug testing program administrator. Our clients include large and small municipalities, State agencies and private companies from all industries.
Our parent company is Wienhoff Drug Testing of Boise, Idaho; our sister company is Bio-Med Testing Services, Inc. of Salem, Oregon.