Julie played three sports while at Germantown Academy - varsity soccer for five years, varsity basketball for three years and varsity lacrosse for three years. She served as captain of the soccer team for three years and captain of the varsity lacrosse team for one year. While playing soccer, Julie was the MVP in 1994 and 1996 and she was the leading scorer for 1993, 1994 and 1995. The GA soccer team was the undefeated Inter-Ac League Champions, 1992-96. Julie was named to the PA Soccer Coaches Association All-State Team in 1994, 1995 and 1996. She was also named to the National Soccer Coaches Association All-East Team for 1995 and 1996 and to the National Soccer Coaches Association All-American Team for 1996.

Shaner’s basketball team was the Inter-Ac League Champions from 1995-97, while the lacrosse squad was the Inter-Ac League Champions in 1996 and 1997. She was the leading scorer for lacrosse in 1995, 1996 and 1997 and was the MVP for Offense for 1995, 1996 and 1997. She set school records for a single season for goals, assists and total points for 1995 and reset the records in 1997. She also set school records for career goals, assists and total points for 1996 and reset the records in 1997. She earned several honors for her lacrosse skills, as she was named All-American Honorable Mention in 1996 and in 1997, she was named First Team All-American.

Julie attended Princeton University and played soccer and lacrosse for four years, serving as soccer captain in 1999 and 2000. She was named the Most Valuable Player for the soccer team for three seasons and was named to the All-Ivy League First Team and Mid-Atlantic Regional All American First Team in 1999 and 2000. On the lacrosse field, Shaner was the captain in 2001 and helped lead the Tigers to the NCAAs in 2000 and 2001 as Ivy League Champions. She was a three-time All-Ivy League first team member and in 1998, earned Ivy League women's lacrosse Rookie of the Year honors. The accolades continue to pile up, as she was named to the IWLCA All American First Team in 2000, 2001 and the second team in 1999, and was a Tewaaraton Trophy Finalist for 2001 (presented to the top women’s collegiate lacrosse player). Julie received the Emily C. Goodfellow ’76 Women’s Lacrosse Award for 2001 and was named the Princeton Alumni Weekly (PAW) Athlete of Year and the Daily Princetonian Female Athlete of the Year in 2001. She also received the C. Otto von Kienbusch Award, presented to the Princeton University Sports Woman of the Year in 2001. Julie is currently a member of the U.S. Elite Lacrosse Team.