As either a player or coach, Walker has participated in 14 of the last 15 NCAA Tournaments and was a part of Northwestern’s three consecutive NCAA titles from 2006-08 as an assistant coach.

In 2017, Walker was honored as the Division I Intercollegiate Lacrosse Coaches Association (IWLCA) National Coach of the Year, as well as the Northeast Reagion Coach of the Year for leading the Eagles into the best-ever season in program history.

In 2016, Walker became the fastest coach in program history to net their 50th career win, doing so in only 74 games against Virginia Tech on April 16. The Eagles went 10-9 that season and earned a spot in the NCAA tournament. She also coached three players to IWLCA ACC All-Academic team, four players to IWLCA first and second All-Northeast Regional honors and two players to All-ACC honors.

In 2015, Walker led a program that cracked the top three in the national rankings before falling to Loyola (Md.) 19-12 in the second round of the NCAA Tournament in May. The 2015 season was highlighted by several accomplishments in the 2015 season. The Eagles finished the season 15-4 overall, their highest winning percentage (.789) since Walker began her tenure as head coach, while recording an impressive 8-0 record on the road last season. Additionally, Walker coached three Tewaaraton Award nominees, including the first Tewaaraton finalist in Boston College history with Sarah Mannelly while Kenzie Kent was named to the IWLCA All-Rookie Team. Three Eagles earned IWLCA All-American Status and the team was honored by the IWLCA for achieving a team GPA of 3.0 or greater under Walker in 2015. Boston College was 5-2 in ACC play during Walker’s third season as head coach.

In 2014 Walker led the Eagles to the quarterfinals of the NCAA Tournament, beating Bryant and Loyola before finally falling to Syracuse. During the 2014 season BC reached a national ranking as high as No. 4. She coached two players to IWLCA All-American honors and four to IWLCA All-Northwest Region honors. She guided the program to a 16-5 overall record and a 3-4 ACC record.