About DSI

DSI Medical is the National Leader in Drug and Alcohol Program Management Services. DSI was founded in 1991 and quickly gained a reputation as a leader in providing complete management and oversight for substance abuse testing programs.

With an elite, experienced and knowledgeable staff – well versed in Federal, State and local regulations – our customers benefit from a Drug and Alcohol Program that insures sound decisions, defensibility and mitigated risk.

Our Mission

Our mission is to provide a superior level of excellence in drug and alcohol testing program management that assures our clients’ policy and regulatory objectives are achieved while at the same time minimizing their risk and liability.

Our Vision

Our vision is that our culture will inspire each individual within our organization to make our customers more than satisfied, make a difference in our world and further provide value that supersedes our customers’ expectations.


Joseph Whelan
Senior Vice President
Senior Vice President Mr. Whelan is the Senior Vice President at DSI MEDICAL SERVICES. He has held that position since 2002. He has thirty-five plus years’ experience in substance abuse testing, addiction, recovery, workplace drug testing, formerly in the transportation industry specializing in Human Resources, Labor, and Employment Litigation.

Mr. Whelan initiated one of the first corporate drug-testing programs in 1981 and one of the principals in drafting the drug and alcohol testing language of the National Master Freight Agreement (NMFA) Article 35, Section 3 & 4 which covers over 100,000 unionized truck drivers across the United States. Mr. Whelan is a regulatory expert and serves as an “Expert Witness” in both civil and labor litigation involving 49 CFR Part 40, 382,655,199 and 46 CFR Parts 16 & 4. He is an expert in all aspects of the federal transportation drug and alcohol programs, speaks frequently and has conducted numerous seminars on workplace testing, substance abuse addiction, recovery, and “Fitness for Duty” matters.