Tom Wroblewski

Elaine Thompson / AP Photo

Citing health concerns and two hospital stays brought on by stress connected to the Boeing 777x contract extension proposal, the embattled local leader of the machinists' union says he'll resign at the end of the month. 

Tom Wroblewski, 59, has been president of District Lodge 751 of the machinists' union since 2007. Prior to the post, he served as a grievance coordinator as well as a business representative for the union, with assignments throughout the Puget Sound region. 

The experience of the 777X contract proposal "changed my perspective on work-life balance," Wroblewski said in a statement. "Your job should not destroy your health."

It's a day of celebration and pride at the Boeing plant in Everett, after the company won the $35 billion-dollar Air Force contract for a new aerial tanker fleet.