University of Illinois System President Timothy Killeen announced his retirement Thursday morning, writing in a letter to faculty and staff that he would step down at the conclusion of his contract in June 2027.
“Serving in this role is truly the honor of my life. But my wife, Roberta, and I felt it was important to provide clarity about our family’s plans now, allowing ample time for the initiation of a thoughtful and thorough transition,” Killeen wrote.
Killeen has led the university system, which includes campuses in Chicago, Springfield and Urbana-Champaign, since 2015. A researcher in geophysics and space science, Killeen took on the massive undertaking of overseeing the state’s largest public university at a time of economic uncertainty.
Since then, board of trustees Chair Jesse Ruiz said Killeen has guided the university through “periods of fiscal uncertainty, a pandemic and a rapidly evolving regulatory environment.” Last year, when Killeen’s contract was renewed, U. of I. reported research funding grew to over $1 billion under his presidency.
Enrollment has also increased steadily, under Killeen’s leadership, even as many other colleges and universities across the country struggle to attract students and keep their budgets in the black. Each of the system’s three schools has increased enrollment over the same 20-year period, with figures at the main campus in Urbana-Champaign climbing from 40,500 in fall 2004 to 59,000 last year. More than 100,000 students enrolled in fall 2025, Ruiz said.
In 2024, the university system piloted a program that would increase the number of students transferring from community colleges to four-year universities. The more than 28,000 students from underrepresented backgrounds at the university have increased 55% since 2016, Ruiz said.
Beyond enrollment, Ruiz said Killeen’s leadership helped strengthen the university system’s financial position, including raising $656 million in fiscal year 2025.
In fiscal year 2023, the system added $24.9 billion to Illinois’ economy, according to a study it published earlier this year.
As for what’s next, Ruiz said the search for the 21st president will begin in the coming weeks.
“The selection of a president is perhaps the most important responsibility of the board of trustees,” Ruiz said. “The board will take its first steps to initiate the search process, fully committed to identifying a president who is capable of following in Tim’s footsteps of excellence and will propel our university system to new heights.”
While he is retiring next year, Killeen said his work is not done.
“There is, of course, still much important work ahead, and I remain fully committed to advancing the ambitious goals before us,” he wrote. “I intend to see this contract period through with as much energy and dedication as ever.”
Chicago Tribune’s Jeremy Gorner contributed.
