The Bangor Fire Chief said the city has successfully applied for the "SAFER Grant" twice before in years past.
The city would partly match federal funds - 25 percent for the first two years and 65 percent the third year.
Matching funds sparked debate whether this would be cheaper than hiring one firefighter outright.
But the Bangor Fire Chief said it's important to train four firefighters with the help of the grant because many on the force are nearing retirement.
"We had a few big blocks of firefighters that were hired in 1988 and 1990," said Chief Tom Higgins. "We want to be proactive and to increase our staffing."
Bangor's Government Operations Committee is going to look at more financial information at next Monday's meeting.
The grant application needs to be submitted by the end of April.