Aramark faces a hearing this October before the board's administrative judges.
The Philadelphia-based company is locked in a contract dispute with Unite Here Local 26. The complaint, issued last week, claims Aramark has been "interfering with, restraining and coercing" its employees at the Hynes Convention Center and the Boston Convention and Exhibition Center.
It claims union members have been harassed by Aramark managers, and that two employees on the union's negotiating committee were fired.
An Aramark spokesman said the company is reviewing the complaint.
