Since 1991, Absolute Drug Detection Services, Inc. (ADDS) has served as an industry leader in developing and coordinating drug testing programs nationally for employers.

Dr. C. B. Thuss, Jr., as President and Certified Medical Review Officer (CMRO), has been reviewing drug screen results since 1988. He was one of the first certified M.R.O.'s in the United States and has served on several trade association committees including the Advisory Board for the American Association of Medical Review Officers (A.A.M.R.O.). He also has served on the Boards of the Drug and Alcohol Testing Industry Association (DATIA) and the North Alabama Chapter of the National Safety Council and currently is a Board member of the Substance Abuse Professional Administrators Association (S.A.P.A.A.).Dr. Thuss, Jr. is also on the Advisory Committee on Athlete Testing,  part of the USET Anti-Doping Committee. He is a past member of the AMA, SMA, ASIM, and ACOEM. Dr. Thuss has also given talks nationwide on Drug testing as well as Occupational Medicine and has served as an Expert Witness on Drug Testing cases.