At the Middle and High School levels, Rosslyn competes as a member of KAISSO (Kenya Association of International Schools Sporting League) and NISAL (Nairobi International Schools Athletic League).  Rosslyn High School teams also participate in an annual sports tournament through the International Christian Schools of Africa (ICSA), which includes sister schools such as Bingham Academy (Ethiopia), HOPAC (Tanzania), Dakar Academy (Senegal), and Heritage International School (Uganda). The annual ICSA tournament is hosted in a different location each year and alternates between football and basketball for both boys and girls.

Rosslyn Academy Elementary School offers a wide variety of after-school clubs, athletic intramurals, and activity groups. Students are encouraged to participate to enhance and enrich their academic experience. Physical Education classes are held twice a week for each grade. These classes are designed to develop the appropriate skills, team learning, and attitudes at each developmental level while also teaching the fundamentals of sports ranging from swimming to football.

Intramural sports are held after school one day a week for Kindergarten through 5th grader. All students are encouraged to participate. Emphasis is on participation, enjoyment, and learning game skills.

In addition to Physical Education in the daily schedule of classes, Rosslyn’s Middle School students have the opportunity to participate in after-school intramurals and the interscholastic sports program. In Middle School, the intramural program consists of the first three weeks of each of the three seasons. After the third week of each season, interscholastic teams are selected for the remainder of the seasons.  These teams will then compete against other schools in after-school games and weekend tournaments.

High School students have the opportunity to participate in a wide range of interscholastic sports teams. The Rosslyn sports calendar is divided into three seasons.  Most sports have a Varsity and a Junior Varsity team, which allows for greater participation and assists with the development of younger players. Over half of the high school student body participates in at least one sport.

Rosslyn has a rich tradition of success in the various fields of competition. While Rosslyn plays to win, our focus on developing the body, mind, and soul of the student-athlete means that how the students play matters even more than the final score.  Rosslyn Sports Administrators hold the teams accountable to win with humility and lose with grace.

The coaching staff works to develop Christian character and sportsmanship in our athletes. Rosslyn encourages athletic participation not only because of the joy it brings to those involved, but because it teaches virtues such as discipline, determination, commitment to others, and teamwork.

Swimming is a school wide sport that involves participation from Kindergarten to 12th Grade. This is a competitive swim team and students compete in age-level appropriate swim meets with various schools from around Kenya.