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
Mr. Whelan is the Director Contracts & Regulatory Oversight at DSI MEDICAL SERVICES. He has been in that position since 2002. He has over 33 years experience in the transportation industry specifically in the areas of Human Resources, employment litigation, substance abuse testing, training and management.

Mr. Whelan initiated one of the first corporate drug-testing programs in 1983 and participated 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 has served on numerous occasions as an “Expert Witness” involving 49 CFR Part 40, 382,655,199 and 46 CFR Parts 16 & 4 in labor/litigation procedures. He is an expert in all aspects of the federal transportation drug and alcohol programs, has conducted numerous employee and supervisor training programs and is a Certified Breath and Alcohol Technician (BAT).