Thousands of Boeing workers are beginning the workweek with uncertainty about their job security after the company announced plans to cut 10% of its workforce.

Boeing plans to lay off about 10% of its workers in the coming months as it continues to lose money and tries to deal with a strike that is crippling production of the company’s best-selling airline planes.

Boeing is set to issue layoff notices to thousands of employees as it grapples with a deepening crisis marked by prolonged strikes and reduced production. Acting U.S. Labor Secretary Julie Su has intervened,