SEATTLE -- The union representing Boeing’s technical workers says it plans to resubmit the company’s contract offer for another membership vote after Boeing rejected the latest union proposals.

The Society of Professional Engineering Employees in Aerospace said Wednesday after both sides met with a federal mediator that it’s disappointing the offer does not provide pensions for new employees. They would have a 401(k) retirement plan instead.

However, the union says accepting the company’s last offer would lock in “considerable improvements” achieved since the company’s initial offer.

Boeing confirms that the terms of what it calls its “best and final offer” remain unchanged.

Technical workers rejected the offer last week, splitting with Boeing engineers represented by the same union who approved the deal.

The union represents about 7,400 technical workers, who also voted to authorize a strike.

The engineers and technical employees work on plans for new planes and solve problems that arise on the factory floor.

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