An up-and-coming New York City real estate broker was hit by a car and killed during a morning jog in the Hamptons, police said.

Stefanie Rock, 29, who worked as an associate broker at Jones Lang LaSalle specializing in commercial office leasing, died on Friday morning after being struck by a Toyota while jogging in Water Mill just after 9 a.m., Southampton Police said. 

Rock was pronounced dead at the scene, and the unidentified driver — who police said cooperated with law enforcement — was taken to Southampton Hospital for evaluation and released. 

An investigation into the crash is ongoing, according to police.

Rock held a Bachelor of Science in Human and Organizational Development from Vanderbilt University and entered into New York commercial real estate after her graduation in 2019, according to business outlet The Real Deal. 

Rock worked as a marketing intern for Brookfield Property Partners in the city before her graduation, the outlet reported. 

But in April 2024, Rock joined JLL’s New York City office, focusing on commercial office space leasing and tenant representation, according to the report. 

Rock helped broker several notable Manhattan deals for the firm, including representing beauty-tech industry startup GlossGenius as it obtained a full-floor lease at ZG Capital Partners’ 838 Broadway in 2024, according to the publication.