As a senior-level specialist, applies advanced technical knowledge in the over‑all operation and maintenance of high pressure heating plant consisting of two or more boilers over 150 h.p. each.

Plans, assigns, and supervises work of skilled and semi‑skilled workers or patient or inmate helpers engaged in operation, maintenance, and repair of steam boilers and auxiliary equipment, stationary engines, compressors, pumps, steam lines, water lines, controls, and meters; 

Directs analysis of boiler feed water samples and determines feed water treatment; 

Confers with supervisor regarding maintenance and operational problems and recommends corrective action; 

Keeps or directs keeping of charts and records; prepares reports on heating plant operations; 

Instructs operating personnel in proper operating and maintenance methods and procedures; 

Performs other work as required.

Knowledge of: boiler law; methods, fuels, materials, and tools used in operation and maintenance of high pressure boilers and auxiliary equipment; boiler room safety; heating, lighting, ventilating, power, and other related mechanical equipment; standard types of automatic controls. 

Ability to: test and analyze operation of steam boilers and auxiliary equipment; instruct and supervise others; keep records; make written reports; perform heavy manual labor; work under and withstand extremes of temperature.

Some positions in this class require a municipal steam engineer's license.

Persons legally authorized to work in the U.S. under federal law, including Deferred Action for Childhood Arrivals recipients, are eligible for employment unless prohibited by other state or federal law.

Four years of experience in operation and repair of high pressure boilers and heating equipment or one year of experience as Stationary Engineer 2 in State service. 

Note: Designations of boilers shall be as defined in Washington Boilers and Unfired Pressure Vessels Law.

Revise class.  Revises minimum qualifications; adopted January 5, 1968.
Revise class.  Revises class code (formerly 75140), general revision, revises definition; adopted
May 10, 2007, effective July 1, 2007.

Revised Legal Requirements; effective June 6, 2024, due to adopted legislative action.