The robbery happened in the Morrisania section of the Bronx just after 6 a.m.on Tuesday, April 16.
The suspect is accused of threatening the worker with a knife while demanding money.
The victim complied, and the suspect fled the location. No injuries were reported.
The suspect is described as a black male, last seen wearing a black baseball cap, gray jacket, black jeans and black sneakers.
Anyone with information in regard to this incident or the identity and whereabouts of the suspect is asked to call Crime Stoppers at 1-800-577-TIPS (8477).