A New Jersey cop and volunteer firefighter has been slammed for dressing up as an Orthodox Jew for a firehouse party where he wore a yarmulke and side curls.

Pete Donatello, 31, wore the outfit to a party at the firehouse in Rochelle Park on December 29 last year.

The party was for a firefighter who was moving out of state.

Pete Donatello, 31, wore the outfit to a party at the firehouse in Rochelle Park on December 29 last year

Donatello posed for photographs, grinning for the camera while others stood around him.

Donatello (pictured with his wife) has not commented

The images surfaced later on social media and infuriated a local resident who complained to the fire department about them.

'It's bad enough to parade around a building, but to put it out for the public to fully see is another issue.

'This gentleman being a Fire Chief and more importantly a Police Officer should have known better with what he was doing,' they said, according to NorthJersey.com.

Donatello, who is a cop at the Maywood Police Department, was 'disciplined' over the incident but it is unclear what punishment he received.

The married father-of-two has worked for the police department since 2012.

As a result of the incident, all volunteers in the township of Rochelle Park were forced to take anti-harassment training.