The Notre Dame student was killed when the hydraulic lift he was on toppled over in high winds last October. At the time, he was filming football practice.
The Indiana Department of Labor is fining the university $77,500 for the violations.
Sullivan's family released a statement Tuesday: "This report is an important step in preventing future accidents, but its findings do not change the fact that Declan is not with us."
The school has until April 7 to respond to the state report.