A former UK administrator was sentenced to 20 years in prison Friday on four counts of first-degree sexual abuse.

Robert Tannenbaum served as the director of the undergraduate research office before taking administrative leave in March and retiring in April, UK spokesman Jay Blanton said.

According to court documents, between August 1998 and June 1999 Tannenbaum engaged in deviant sexual intercourse with the victim four to five times a week.

Tannenbaum served as director of Academic Computer Services from 1991 to 2001 and was the editor of “Kaleidoscope,” the UK Journal of Undergraduate Scholarship, according to the UK Undergraduate Education Web site. He was also the principal investigator for the Appalachian and Minority Science, Technology, Engineering and Mathematics major programs.