A Medical Review Officer (MRO) plays a pivotal role in helping employers ensure a safe workplace. An MRO is a licensed physician who reviews non-negative drug tests, determines if the presence of a tested substance is the result of legal usage and reports results directly to employers. An MRO may serve as an expert witness in contested cases as well. In addition, MRO’s provide expert guidance and training to collectors and often deliver Reasonable Suspicion Training for Supervisors to employers, a program MOH sponsors several times each year. MRO’s may also manage federal random drug testing consortiums to meet requirements established by Federal Motor Carriers, Pipeline, FAA, Federal Railroad, US Coast Guard, Federal Transportation agencies and others.