Kiesewetter was the Pennsylvania 1A Player of the Year in 2021.
Smith was a four-star recruit in the class of 2024.
Smolik suffered a season-ending injury against Iowa.
Kotelnicki spent two years leading Penn State's offense.
Penn State hired Iowa State safeties coach Deon Broomfield on December 11.
Mack earned starting safety reps early in the season.