The board ruled the U.S.-owned company violated section 75 of the Labour Relations Act by engaging in bad-faith bargaining with its Gander employees, who are members of Unifor Local 597.
"D-J Composites introduced proposals that no reasonable union would agree to,” said Lana Payne, Unifor’s Atlantic regional director.
“In our union's opinion, these proposals were designed to lengthen the lockout.”
D-J Composites has been ordered to remove all proposals that attempt to eliminate seniority-based rights for Unifor Local 597 members and must deliver a new offer, without the offending proposals, to the union within seven days.
The decision came two days after hearings concluded on May 1.
The offending proposals were first tabled in early March after the company’s 32 aerospace workers in Gander had been locked out for nearly three months.