Sears began his legal career working in private practice for two years and then was re-commissioned as a Captain in the
U.S. Air Force Judge Advocate General's Corps. In 1950, Sears joined the
University of Colorado Law School faculty. For the next 50 years, he was as an educator, writer, arbitrator, and administrator. Sears was eighth Dean of the Colorado Law School from 1968 to 1973. While Dean, he was instrumental in securing funds from the
Colorado Legislature to complete renovation and new construction on the Fleming Law building, and received the
University of Colorado Recognition Medal from the Regents in 1975. He also received the Associated Alumni Robert L. Stearns Award in 1967. Sears was a member of the
National Academy of Arbitrators and was appointed by the baseball commissioner as one of the few
Major League Baseball arbitrators, frequently mediating disputes between players and owners. Three major awards are named in his name including the
University of Colorado Law School’s Don W. Sears Award and Don Sears Diversity Scholarship, and the
Colorado Bar Association Ethics Committee's Don W. Sears Award for Ethical Enhancement of the Legal Profession in Colorado. ==Scholarly work==