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.
Tom Beeby will serve as the 2019 Class Gift Executive Director.
When asked why it took so long for the quarterback to address his throwing "inefficiencies," Hackenberg said he didn't know and spoke about the lack of guidance he received from the Jets coaching staff.
Oakland will send a conditional seventh-round pick to the Jets in exchange for Hackenberg, who never saw the field in a regular season game during two seasons as a Jet.
Penn State will play at Madison Square Garden on January 26 and face off against several strong non-conference opponents at Pegula Ice Arena.