[citation needed] Prior to his appointment as President of the George Washington University, LeBlanc served as the University of Miami's Chief Academic Officer, Chief Budget Officer, Executive Vice-president, and Provost.

[citation needed] Prior to Miami, LeBlanc served as Vice Provost & Dean of the Faculty of Arts, Sciences, and Engineering at the University of Rochester.

He is credited with the development of the biomedical engineering department with the University of Rochester Medical Center.

[5] However, in September 2021, GWU's Board of Trustees Chair Grace E. Speights said LeBlanc would step down at the end of 2021, to be replaced by former Washington University in St. Louis Chancellor Mark S. Wrighton on an interim basis while a search is being conducted for a permanent replacement.

"[8] The president later apologized, saying "The point I was making – that majority rule should never suppress the human rights of others – was obscured by the example I used...I regret my choice of words and any harm I unintentionally inflicted on a community I value greatly.