Thousands of Massachusetts janitors rallied on Boston Common on Saturday to demand higher wages and benefits.
The contracts for about 13,000 janitors in Boston and beyond are up at the end of the month.
The janitors work in public areas like the MBTA, Logan Airport and many area colleges and universities.
"Unfortunately workers in this industry still struggle to make ends meet they are among the lowest paid workers in Massachusetts," said Roxana Rivera, Vice President SEIU. "The industry in Massachusetts is still heavily part-time so workers have to pile up other jobs in order to make ends meet."
Supporters say the worker's current contract was negotiated during the recession and isn't in line with the current cost of living.