Mark Osbeck, ’86, is a clinical professor of law at the University of Michigan and teaches in the Law School’s Legal Practice Program. He also is a leading authority on marijuana law, having authored two significant books on the subject: Cases and Materials on Marijuana Law (West, 2019) and Marijuana Law in a Nutshell (West, 2017).

Osbeck also is the author of a widely used legal research text: Impeccable Research: A Concise Guide to Mastering Legal Research Skills, 3rd ed. (West, 2022). In addition to marijuana law, his research interests include legal writing, legal research, judicial decision-making, and predictive legal analysis.

Before joining Michigan Law in 2001, Osbeck was a partner in the Denver office of a large law firm. He litigated sophisticated commercial cases for a number of years, first in Washington, DC, and later in Denver, and he has extensive trial and appellate experience before a number of state and federal courts, including the US Court of Appeals for the 10th Circuit.

While attending Johns Hopkins, he received a University Fellowship, the top departmental award. In law school, he received certificates of merit for legal writing and political philosophy.