The principal of Hammarskjold High School is Derek Di Blasio and the vice-principals are Kathleen Andrews and Zelka Black.

The HHS music department travels to different cities each year to compete and perform against other high schools, often with great amounts of success.

In the 2018-2019 school year the HHS music department traveled to Chicago, IL with their band class, their strings ensemble, and their vocal choir.

During second semester, the HHS music department organizes a gala night with a different theme to be performed in the Hammarskjold Gymnasium each school year.

The gala night consists of performances from the entire department, as well as dancing, singing and draws with prizes to be won.

As of right now, the HHS drama department is in rehearsals for the Broadway smash hit The Wedding Singer, and is scheduled to perform the show in June 2020 in the Hammarskjold Gymnasium.