Approximately 3,200 members of the International Association of Machinists and Aerospace Workers (IAM) District 837 have voted to reject Boeing’s latest four-year labor agreement offer. The vote took place on August 3, 2025, and covers workers at Boeing facilities in St. Louis, St. Charles, Missouri, and Mascoutah, Illinois.
The decision comes after a previous proposal from Boeing was also rejected by union members on July 27. As a result of Sunday’s vote, a strike is set to begin at midnight on August 4.
“IAM District 837 members have spoken loud and clear, they deserve a contract that reflects their skill, dedication, and the critical role they play in our nation’s defense,” said IAM District 837 Directing Business Representative Tom Boelling. “We stand shoulder to shoulder with these working families as they fight for fairness and respect on the job.”
“Our union is built on democracy, and our members have every right to demand a contract worthy of their contributions,” said IAM International President Brian Bryant. “We will be there on the picket lines, ensuring Boeing hears the collective power of working people.”
“IAM District 837 members build the aircraft and defense systems that keep our country safe,” said IAM Midwest Territory General Vice President Sam Cicinelli. “They deserve nothing less than a contract that keeps their families secure and recognizes their unmatched expertise.”
“Solidarity is our strength. This vote shows that when workers stand together, they can push back against corporate greed and fight for a better future for themselves and their families,” said IAM Resident General Vice President Jody Bennett. “We are proud to back our members every step of the way.”
IAM members involved in this action assemble and maintain advanced aircraft such as the F-15 and F/A-18 fighter jets as well as other missile and defense technologies crucial for national security.
The IAM Union represents about 600,000 active and retired workers across North America in sectors including aerospace, defense, airlines, railroads, healthcare, automotive industries, among others. More information about the union can be found at https://www.goiam.org/.
