Workers from the Trump Taj Mahal casino in Atlantic City will march to Mayor Don Guardian’s office Monday morning to ask him to reconsider granting concessions the casino says are necessary to keep it open.

About 1,000 employees have signed a petition calling on the mayor and other elected officials “to do everything possible” to keep the casino open.

The Taj Mahal has threatened to close in December if it doesn’t get a $175 million package of aid from the city and state governments. The company has asked the city to drastically reduce its property tax assessments, something that has been ruled out as unaffordable for a city with severe budget problems.

Valerie Bisset, a slot manager at the Taj Mahal, said many employees want a voice in the casino’s future. “There are so many people who have given their lives to this company. We can do well here. We just need the support.”

Mr. Guardian didn’t immediately respond to requests for comment on Sunday.