Hagen returned to Pacific to join the Tigers' coaching staff before the 2010 season and will enter her third year of coaching for Pacific. In her two years in the dugout for Pacific, Lizzie has helped develop a young core of players into conference champions after earning the Tigers' first ever Big West title in 2011. Working with the infield defensively and all of the Tigers' hitters, Hagen helped to guide Pacific's hitters to a team and conference-record .323 batting average, shattering the previous records of .299 and .311, respectively. Additionally, Hagen was in charge of Pacific's scouting and game-plan development

Prior to coming back to Pacific, Hagen spent two seasons at Saint Mary's after graduating from Pacific in 2007 with a degree in education. On the bench for the Gaels, Hagen's duties included working with the infield, hitting and game day management. Off the field, Hagen assisted with the Gaels' recruiting and travel coordination.

One of the top players to wear the Orange and Black at Pacific, Hagen finished her four year career in 2007. A two-time all-conference shortstop, Hagen ended her career among the top-10 in Tiger history in home runs (No. 6 - 17), doubles (No. 8 - 33), triples (No. 8 - 7), RBI (No. 10 - 85), Runs (No. 8 - 112) and walks (No. 4 - 80). In her final season of action, Hagen helped lead the Tigers back to the NCAA tournament after posting career-highs in hitting (.281), home runs (7), hits (50), RBI (33) and runs (42).

Defensively, Hagen was one of the best shortstops in the conference and the country as she led the Tigers' infield to a .978 fielding percentage in 2006, ranking Pacific No. 6 in the country in fielding. During the season, Hagen committed just four errors at short, a career-best for the infielder.