's provost will retire at the end of current academic year, the St. Louis Post-Dispatch reports.
According to the Post, Edward Macias will end his 25 year tenure on June 30, 2013.
He was first named provost in 1988 and became the executive vice chancellor and dean of Arts & Sciences in 1995.
In 2009, Macias was again named provost or chief academic officer, while continuing his job as executive vice chancellor for academic affairs.
Macias joined the university in 1970 and has been a professor, chair of the chemistry department and director of summer school during his time at Wash U.
The school said it will conduct a national search for his replacement.