Unifor Local 444 has started negotiations on its first contract for workers at TRQSS.
The company located in Lakeshore manufactures seatbelts for the automotive industry and employs around 600 people.
The employees voted to join the union in January.
"They've been unorganized since 1986 so they've obviously paid the right wages to the workers and kept the union out and in the last four years they haven't got wage increases and they wanted to join the union," said Unifor Local 444 President Dave Cassidy.
This is one of the largest additions to the union since Unifor was formed.
Cassidy said this is just the first step in contract negotiations.
"This isn't about us versus them it's about we collectively getting the right deal. They understand that we need to make sure that we make gains in wages, pensions etcetera. They understand our position so we're going to work through them and come to a collective effort that our members are going to be happy with," said Cassidy.
There have been no deadlines set at this time.