Among her highlights with the national team were an appearance at the 2016 Summer Olympics in Rio de Janeiro and a bronze medal at the 2019 Pan American Games.

[4] She attended Tower Hill School and was a standout athlete, excelling at field hockey, basketball and lacrosse.

[4] Van Sickle was friends with future Olympic basketball player Elena Delle Donne through sixth grade at Tower Hill; she focused mainly on the sport until 10th grade and competed at Amateur Athletic Union (AAU) basketball tournaments, before deciding to concentrate on field hockey as a sophomore in high school.

[6] At the end of the season, she was named by the Delaware Field Hockey Coaches Association as a first-team all-state selection and the state's player of the year.

[8] As a senior, she helped Tower Hill compile an undefeated record of 20–0 while winning their third-straight title; Van Sickle was again chosen first-team all-state and the state player of the year.

[15] In her collegiate career, Van Sickle also received three National Field Hockey Coaches Association (NFHCA) first-team All-Region laurels (and second-team honors as a freshman) and was three times named the UNC most valuable player.

[3] The nickname is short for the dessert popsicle, with the teammate noting that Van Sickle's last name sounded similar to it.

[3] Van Sickle's first experience with USA Field Hockey was in 2004, when she became a member of the Olympic Development Program as part of the Futures squad.

[4] On July 1, 2016, Van Sickle was named to the United States women's field hockey team for the 2016 Summer Olympics in Rio de Janeiro.

[4] Van Sickle scored the deciding goal in the team's second game of Olympic preliminary play against Australia.

[19] Van Sickle retired from field hockey in December 2019, finishing her international career with nine goals in 148 appearances; she was considered "a key element on the defensive line and as a penalty corner inserter[a]" with the national team.

[19] She served a year as the director of PowerHouse Field Hockey Club, in Wayne, Pennsylvania, before becoming an assistant coach for the Princeton Tigers in 2021.