An Act to guarantee just cause job security

This bill amends Massachusetts labor laws to require employers to provide "just cause" before terminating an employee, meaning dismissal is only allowed for failure to perform job duties or serious misconduct. It establishes a 30-day probation period during which these protections do not apply and mandates that employers use a progressive discipline system with graduated responses to performance issues. The legislation also defines specific terms related to employment, such as biometric data, electronic monitoring, and bona fide economic reasons for layoffs, while holding staffing agencies jointly responsible for compliance with these new rules.