What is holdens extracurricular job at pencey?

Holden Caulfield doesn't have an extracurricular job at Pencey Prep. He's expelled from the school, and his main focus is on getting out of there.

Holden does mention that he played a lot of sports before coming to Pencey, including football, basketball, and baseball. However, at Pencey, he's not involved in any sports or clubs. He primarily spends his time wandering around, smoking, and interacting with the people he encounters.