He continued his education at the University of Missouri–Kansas City, where he received a master's degree in public administration in 1986 and a Ph.D. in 1992.
[citation needed] His post-graduate studies include the Institute for Educational Management at Harvard University and the Strategic Planning and Higher Education Marketing program at the Wharton School of the University of Pennsylvania.
[citation needed] In 2005, Sellars became the 15th president of Drury University, though his tenure ended abruptly after he announced the school was millions of dollars in debt, initiated a re-examination of the university's mission, and appeared to squelch academic freedom following a controversial interview by a faculty member.
[2][3] One month later, on May 24, 2007, Sellars was named president of Graceland University in Lamoni, Iowa, effective July 15.
[5] He was succeeded by Patricia Draves, who formerly served as vice president for academic affairs and dean of the University of Mount Union in Alliance, Ohio.