Prior to JU, Hamlin coached youth competitive softball in Colorado. She worked for HitStreak Baseball and Fastpitch Academy as the head coach of their 16u team, defensive instructor for all of their teams from 10u up to 18u, and slapping, hitting, catching, and throwing instructor.
Before moving to Colorado, Hamlin was a volunteer assistant coach at University of Redlands. She was responsible for helping with infield and team defense, offense, and base-running instruction. That year, Redlands captured their sixth consecutive conference title and sixth consecutive NCAA tournament appearance. That team also boasted seven first team all-conference players, conference Rookie of the Year, NCAA Division III Softball Championships First-Round All-Tournament Team player Lizett Casillas, and Division III All-American Heather Neumann.
She began her collegiate coaching career with California State University- San Bernardino. There she was in charge of the outfield, slapping, and helped with field maintenance. That team boasted all-conference second-team player Ashley Collinwood, first-team player Debbie Shisler, and ESPN The Magazine all-District 8 Academic first team player Tori Beaudette. Shisler and Beaudette were also named to NCAA Division II All-West Region teams.
Hamlin's first coaching experience was with the Harr Disciples just outside of Munich, Germany. She played professionally with and helped instruct their first team players, and also worked with their second and under-15 teams on all aspects of the game.
In her collegiate career, Hamlin was a four-year letter-winner at University of Redlands from 2005-2008. She finished her career in the top 10 in nearly all offensive categories. Hamlin is the all-time leader in triples (20) and sacrifices (54), while ranking second in at-bats (543) and total bases (255), and third in hits (199), runs scored (130), stolen bases (37), and games started (162).
Hamlin graduated with a bachelor's in communicative disorders in 2008 and obtained a master's in sport and performance psychology from University of Denver in June 2012. She is now pursuing a second Master's degree from JU in Instructional Leadership and Organizational Development.