Boilermaker License Requirements in Washington
License RequiredLast verified March 24, 2026
Agency And Exam
Issuing agency: Washington State Department of Labor and Industries, Boiler Section
Official licensing agency website
Exam provider: State-administered
Reciprocity And License Levels
License levels
Boiler Operator - SpecialBoiler Operator - Second ClassBoiler Operator - First ClassChief Engineer
Reciprocity states
None listed
Notes
Washington State requires boiler operator licensing through the Department of Labor and Industries, Boiler Section. License classes include Special Engineer, Second Class, First Class, and Chief Engineer, based on boiler horsepower operated. Applicants must meet experience requirements and pass state-administered examinations under RCW 70.79.