JTA: This Jewish Parkland survivor hid in a closet during the shooting. Now he advocates for gun reform.

Throughout his senior year in high school, Ryan Deitsch has stayed busy. A month ago, the 18-year-old filled his time outside of classes performing in an doing improvisational theater group he started at his school, producing TV content for the school’s newsroom and working as a busboy at a local restaurant.

Now he fills his schedule talking to lawmakers and organizations, doing interviews with media outlets and visiting other high schools to organize people who want to get politically involved.

Deitsch is a student at Marjory Stoneman Douglas High School in Parkland, Florida, and was inside when a former student stalked its halls with an AR-15-style rifle, killing 17 students and staff members. Deitsch hid with other students in a closet during the massacre.