Sauve originally committed to Vermont in 2015, but flipped to Penn State at the eleventh hour and will join the Nittany Lions next season.
Guadagnino will continue to provide legal advice as associate general counsel in addition to his duties as vice president.
A Pennsylvania Disciplinary Board hearing began on Tuesday in Pittsburgh for former Penn State general counsel Cynthia Baldwin, who is accused of violating rules of professional conduct in her representation of former university administrators during the Jerry Sandusky investigation.
Tom Beeby will serve as the 2019 Class Gift Executive Director.
Penn State Career Services will launch Nittany Lion Careers on June 18.