Federal Jobs
Many federal positions require US citizenship. Opens entire career path (federal law enforcement, postal service, military officer, etc.). Non-citizens ineligible.
Job Security
Can't be deported. Green Card holders can be deported if serious crimes. Citizens cannot—citizenship is permanent protection.
Salary Increases
Some employers pay citizenship premium for security-sensitive roles. Small increase but tangible.
Union Benefits
Some unions require citizenship for membership. Opens certain trade jobs.