Montana Boiler Operator Program

Renew License Apply for a License Look Up a License Change Address Interested Party Customer Service Survey

Boiler Engineer

Available Boiler Operator License Types

  • Steam boilers operated not in excess of 15 psi and water boilers operating not in excess of 50 psi and 250° temperature.

  • Hot water heating boilers not in excess of 30 pounds per square inch gauge pressure and 210 degrees F, and hot water supply boilers not in excess of 160 pounds per square inch gauge pressure and 210 degrees F.

    This application is only available online at ebiz.mt.gov/pol 

  • Steam boilers operated not in excess of 150 psi and water boilers operating not in excess of 160 psi and 350° temperature and 150 horse power.
  • Steam boilers operated not in excess of 250 psi, water boilers operating not in excess of 375 psi and 450° temperature, and steam-driven machinery not to exceed 100 horsepower per unit except traction and hoisting engines.
  • All classes, pressures and temperatures of steam and water boilers and steam driven machinery except traction-hoisting engines.
  • Steam boilers that operate not in excess of 150 psi, that are not operated for more than 6 months of the year, and that are not operated for purposes other than the harvesting or processing of agricultural products.

  • Traction engines or boilers on wheels.

    The following outlines general licensing information. For specific information on filing an application, you will need to obtain the application, which includes a detailed listing of the requirements.

    • Application fee for all classes of licensure is $70.00
  • Must have 3 months full-time experience (480 hours) in the operation of a boiler in this classification under an engineer who holds a valid low pressure or higher license or completion of a training course approved by the Department of Labor and Industry specific to low pressure boilers, and a minimum of 40 hours experience under a licensed boiler engineer, and pass a written exam.
  • Must have 2 months full-time experience (320 hours) in the operation of a boiler in this classification under an engineer who holds a valid low pressure or higher license or completion of a 6 hour training course approved by the Department of Labor and Industry specific to limited low pressure boilers, and a minimum of 8 hours experience under a licensed boiler engineer, and pass a written exam.
  • Must have 6 months full-time experience (960 hours) in the operation of a boiler in this classification under an engineer holding a valid third class or higher license or completion of a training course approved by the Department of Labor and Industry specific to third class pressure boilers, and a minimum of 40 hours experience under a licensed boiler engineer, and pass a written exam.
  • Must have 2 years' full-time experience in the operation of a boiler in this classification under an engineer holding a valid second class or first class license; or hold a valid third class license with at least 1 year's full-time actual experience in the operation of a boiler under this classification under an engineer holding a valid second or first class engineer.
  • Must have 3 years' full-time experience in the operation of a boiler in this classification under an engineer holding a first class license; must hold a valid second class license with at least 1 years full-time actual experience in the operation of a boiler in this classification under an engineer holding a valid first class license; or must hold a valid third class license with at least 2 year's full-time experience in the operation of a boiler under this classification under an engineer which a valid first class license.
  • There are no experience requirements
  • Must have at least 50 hours of experience with Traction Engines. Must also have attended and completed a steam school. The hours accrued during the steam school may be substituted for experience hours.
  • Required for all classes of licensure. Exams are administered at local Job Services. Applicants must be pre-approved prior to taking the examination.
  • The renewal period runs annually from February 1 through April 1.
  • $35.00 effective Feb.1.2005
  • None
  • Must be 18 years of age or older.
Privacy & Security Accessibility Services Agencies