Under the general supervision of a Supervisor of Electrical and Instrumentation Repair, incumbents assemble, install, maintain, calibrate, troubleshoot and repair and/or replace electrical, electronic, mechanical, pneumatic, hydraulic, digital and analog control equipment and systems; operate, maintain, calibrate and repair pneumatic and electronic testing and measuring instruments; maintain records and prepare reports on maintenance and repair work, calibration readings and related data; order parts, supplies and equipment; instruct lower level classes in the series; read, interpret and prepare schematic diagrams, blueprints, sketches and equipment specifications; perform math calculations related to the trades; drive to and perform inspections on new construction; maintain shop area; and perform related duties as required. Ability to: Utilize specialized tools, math formulas and equipment of the trade; independently troubleshoot and repair electrical, electronic, mechanical, pneumatic, hydraulic, digital and analog control equipment and systems; read, interpret and prepare schematic diagrams, blueprints, sketches and equipment specifications; maintain records and prepare reports; independently perform difficult assignments; instruct lower-level apprentices in trade techniques.