A senior City Council staffer was caught by The Post misusing a parking placard and got reamed out by his red-faced boss — who’s been a leading proponent of the crackdown on such scofflaws.

“I’m pissed,” Brooklyn Councilman Justin Brannan fumed to The Post when he learned that senior adviser Jonathan Yedin, 35, has had one of the special permits illegally displayed in the dashboard of his Mazda CX-5 on the streets of parking-starved lower Manhattan.

“I have been vocal about placard abuse, so it is embarrassing to learn a member of my staff used a placard he should not have,” said Brannan — who tweeted just four months ago, “I do not support city employees abusing parking privileges.”

The Brooklyn pol is the sponsor of three pending council bills proposing crackdowns on the placards, which ballooned from 67,297 in 2008 to 121,000 this year.

The permits are doled out to certain government workers who are then only supposed to display them while on duty and in designated areas.

But abuse is rife, with unauthorized drivers obtaining the placards. Scofflaws also use the permits to park in off-limits spaces, including in front of fire hydrants.

Confronted by The Post at his boss’s Third Avenue office last week, Yedin acknowledged that the placard didn’t belong to him but tried to explain away its presence in his vehicle by saying, “Other people use my car.”

Brannan wasn’t buying the lame excuse.

“I don’t care who this placard belonged to, I will not tolerate this,” the politician said. “What happened here was wrong, and it will not happen again.”

The permit — seen in the dashboard of Yedin’s Mazda on June 14 and again last week — was issued to a “New York Court Officer” and supposed to be used “for official business only.”

When The Post spotted Yedin’s car both times, it was parked in front of 110 William St. in spaces reserved for the city’s Economic Development Corporation employees. Yedin lives around the corner on Fulton Street.

Dennis Quirk, president of the New York State Court Officers Association, said the placard belonged to Yedin’s girlfriend, who is a member of his union.

He refused to give her name but said that because she abused the perk, she was ordered to forfeit the placard and she gave it back Friday.

“We told her to turn it in . . . She said she used the car and left it in the car. You’re not supposed to have it out of your possession,” Quirk said.

In February, Mayor Bill de Blasio vowed to eradicate parking-placard abuse with $50 penalties and promised to revoke the perks after three violations.

“For anyone out there who thinks that they can keep abusing the placard they have or using a fake placard, that day is coming to a close,” the mayor said at the time.

A couple months later, one of his highest-paid employees was caught misusing one of the permits to park outside a Manhattan hotel — where Hizzoner was inside on stage for an event.