A lifelong resident of Ithaca, Rosica was a graduate of Ithaca High School, and he served with the U.S. Army during World War II.
He joined the Grounds Department as an entry-level grounds worker in 1937, and he retired in 1988 as foreman of landscape maintenance.
"He was highly dedicated," said Dennis Osika, director of the Grounds Department. "His whole life was focused around his work. He was responsible for making a lot of lasting landscape beautification improvements on campus."
Rosica is survived by his sister Emma Guidi and nieces and nephews. Memorial contributions may be made to the Grounds Department.