• Boeing posted contract jobs for engineering and technical roles.
• The move escalates the labor dispute with its white-collar union.
• A strike could delay 737 MAX 10 and 777-9 certification.
• Boeing is implementing a contingency plan in case of a work stoppage.

This escalation may indicate a significant challenge for Boeing in resolving its labor dispute, which could further delay key aircraft certifications and impact the company's competitiveness. The move suggests Boeing is preparing for a potential strike, which could have broader implications for the aerospace industry.