DISA welcomed several well-respected industry speakers to present at the first annual ‘Day with DISA’ drug testing conferencing and networking event. One of those speakers was Richard Clay, Vice President of National Accounts at Psychemedics Corporation. Because Psychemedics is DISA’s preferred hair testing vendor partner, we asked Richard to present some of their real workplace data and breakdown positivity rates for marijuana both pre- and post-MRO review.