What is the average Diesel Mechanic Sr salary for Helena, MT?
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As of July 01, 2025, the average Diesel Mechanic Sr salary in Helena, MT is $60,078. The chart below represents localized salaries for some of our most popular Diesel Mechanic Sr job titles in Helena, MT. Salaries can vary greatly depending on numerous factors, including position, location, years of experience, and level of education. Salary.com’s team of Certified Compensation Professionals analyzed survey data collected from thousands of HR departments at companies of all sizes and industries to compile a range of salaries for various Diesel Mechanic Sr job titles in Helena, MT. Apply your personal criteria to one of the job titles below to get your personalized salary estimate.
Diesel Mechanic Sr Salaries in Helena, MT
| Job Title | Salary | Hourly Rate | Location | Date Updated |
| Diesel Mechanic III | $61,767 | $29.70 | Helena, MT | July 01, 2025 |
| Diesel Mechanic II | $54,885 | $26.39 | Helena, MT | July 01, 2025 |
| Diesel Mechanic I | $46,640 | $22.42 | Helena, MT | July 01, 2025 |
| Diesel Mechanic Supervisor | $72,392 | $34.80 | Helena, MT | July 01, 2025 |
| Automotive Mechanic II | $50,927 | $24.48 | Helena, MT | July 01, 2025 |
| Automotive Mechanic III | $57,989 | $27.88 | Helena, MT | July 01, 2025 |
| Automotive Mechanic IV | $67,282 | $32.35 | Helena, MT | July 01, 2025 |
| HVAC Mechanic II | $56,993 | $27.40 | Helena, MT | July 01, 2025 |
| Sheetmetal Mechanic II | $46,511 | $22.36 | Helena, MT | July 01, 2025 |
| HVAC Mechanic III | $66,398 | $31.92 | Helena, MT | July 01, 2025 |
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Performs inspection, maintenance, repairs, and overhauls of diesel engines. Troubleshoots and diagnoses problems. Utilizes computer electronics systems to interpret failure modes. Replaces and/or refurbishes parts. Maintains maintenance logs according to requirements. Ensures services provided follow all quality standards and safety procedures. May perform DOT annual inspections on vehicles. Typically requires a high school diploma. Typically requires Commercial Driver License (CDL) - Class A. Typically requires a Certificate in Automotive & Diesel Technology. Typically reports to a supervisor or manager. Works independently within established procedures associated with the specific job function. Has gained proficiency in multiple competencies relevant to the job. Typically requires 3-5 years of related experience. Diesel Mechanic III Salaries in Helena, MTAlternate Job Titles:Diesel Engine Mechanic III, Diesel Engine Specialist III, Diesel Technician III, Diesel Mechanic III
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Performs inspection, maintenance, repairs, and overhauls of diesel engines. Troubleshoots and diagnoses problems. Utilizes computer electronics systems to interpret failure modes. Replaces and/or refurbishes parts. Maintains maintenance logs according to requirements. Ensures services provided follow all quality standards and safety procedures. May perform DOT annual inspections on vehicles. Typically requires a high school diploma. Typically requires Commercial Driver License (CDL) - Class A. Typically requires a Certificate in Automotive & Diesel Technology. Typically reports to a supervisor or manager. Works under moderate supervision. Gaining or has attained full proficiency in a specific area of discipline. Typically requires 1-3 years of related experience. Diesel Mechanic II Salaries in Helena, MTAlternate Job Titles:Diesel Engine Mechanic II, Diesel Engine Specialist II, Diesel Technician II, Diesel Mechanic II
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Performs inspection, maintenance, repairs, and overhauls of diesel engines. Troubleshoots and diagnoses problems. Utilizes computer electronics systems to interpret failure modes. Replaces and/or refurbishes parts. Maintains maintenance logs according to requirements. Ensures services provided follow all quality standards and safety procedures. May perform DOT annual inspections on vehicles. Typically requires a high school diploma. Typically requires Commercial Driver License (CDL) - Class A. Typically requires a Certificate in Automotive & Diesel Technology. Typically reports to a supervisor. Works under the close direction of senior personnel in the functional area. Possesses a moderate understanding of general aspects of the job. May require 0-1 year of general work experience. Diesel Mechanic I Salaries in Helena, MTAlternate Job Titles:Diesel Engine Mechanic I, Diesel Engine Specialist I, Diesel Technician I, Diesel Mechanic I
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Oversees day to day operations of a diesel maintenance shop. Supervises, trains, and coordinates work of mechanics and technicians. Maintains inventory of replacement parts, tools, and equipment required for operations. Ensures preventive maintenance and repairs meet all quality and safety standards. Knowledge of DOT rules and regulations. Experienced in heavy diesel engine diagnosis and repairs. Requires a high school diploma. Typically requires Commercial Driver License (CDL) - Class A. Typically requires a Certificate in Automotive & Diesel Technology. Typically reports to a supervisor or manager. Working team member that may validate or coordinate the work of others on a support team. Suggests improvements to process, is a knowledge resource for other team members. Has no authority for staff actions. Generally has a minimum of 2 years experience as an individual contributor. Thorough knowledge of the team processes. Diesel Mechanic Supervisor Salaries in Helena, MTAlternate Job Titles:Diesel Maintenance Supervisor, Diesel Shop Supervisor, Diesel Mechanic Supervisor
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Performs maintenance and repairs on automobiles and light trucks. Performs major repairs like body work, chassis and engine repair, and disassembling and assembling components. Also performs minor repairs and maintenance work such as replacing worn drive belts, hoses, and filters. Helps diagnose issues, uses electronic indicator systems to identify problems, and performs routine safety checks on brakes, suspension, exhaust, cooling, and other systems. Adheres to appropriate safety procedures. Typically requires a high school diploma. Typically requires a Certificate in Automotive Technology. Typically reports to a supervisor. Works under moderate supervision. Gaining or has attained full proficiency in a specific area of discipline. Typically requires 1-3 years of related experience. Automotive Mechanic II Salaries in Helena, MTAlternate Job Titles:Auto Tech/Mechanic II, Automotive Service Technician II, Automotive Mechanic II
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Performs maintenance and repairs on automobiles and light trucks. Performs major repairs like body work, chassis and engine repair, and disassembling and assembling components. Also performs minor repairs and maintenance work such as replacing worn drive belts, hoses, and filters. Diagnoses issues, uses electronic indicator systems to identify problems, and performs routine safety checks on brakes, suspension, exhaust, cooling, and other systems. Adheres to appropriate safety procedures. Typically requires a high school diploma. Typically requires a Certificate in Automotive Technology. Typically reports to a supervisor. Works independently within established procedures associated with the specific job function. Has gained proficiency in multiple competencies relevant to the job. Typically requires 3-5 years of related experience. Automotive Mechanic III Salaries in Helena, MTAlternate Job Titles:Auto Tech/Mechanic III, Automotive Service Technician III, Automotive Mechanic III
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Performs maintenance and repairs on automobiles and light trucks. Performs major repairs like body work, chassis and engine repair, and disassembling and assembling components. Also performs minor repairs and maintenance work such as replacing worn drive belts, hoses, and filters. Diagnoses issues, uses electronic indicator systems to identify problems, and performs routine safety checks on brakes, suspension, exhaust, cooling, and other systems. Adheres to appropriate safety procedures. Typically requires a high school diploma. Typically requires a Certificate in Automotive Technology. Typically reports to a supervisor. Independently performs a wide range of complex duties under general guidance from supervisors. Has gained full proficiency in a broad range of activities related to the job. Typically requires 5-7 years of related experience. Automotive Mechanic IV Salaries in Helena, MTAlternate Job Titles:Auto Tech/Mechanic IV, Automotive Service Technician IV, Automotive Mechanic IV
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Performs maintenance and service repairs on heating, ventilating, and air conditioning systems. Installs new units or replacement parts for existing units according to specifications and established safety guidelines. Follows blueprints or engineering specifications to install units. Performs troubleshooting to identify the cause of problems. Maintains and secures a spare parts inventory. Recommends purchasing maintenance equipment and supplies as required to improve processes and efficiencies. Typically requires an apprenticeship and/or completion of technical training. Requires a high school diploma. The regulations governing the location may require an HVAC Mechanical State License and EPA Section 608 Certification (CFC). Typically reports to a supervisor or manager. Works under moderate supervision. Gaining or has attained full proficiency in a specific area of discipline. Typically requires 1-3 years of related experience. HVAC Mechanic II Salaries in Helena, MTAlternate Job Titles:HVAC Installation Technician II, HVAC Maintenance Technician II, Intermediate HVAC Mechanic, HVAC Mechanic II
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Sets up and operates machines such as drill presses, punch presses, saws, shears, bending rolls, brakes, grinders, and numerical control equipment to shape and alter sheetmetal according to specifications. Follows blueprints, rough sketches, or engineer drawings to shape metal accurately. Uses hand and power tools to shape, cut, and smooth metal and to blend seams. May set up and operate soldering and welding equipment. Typically requires a high school diploma. Typically requires a Sheetmetal Apprenticeship. Typically reports to a supervisor or manager. Works under moderate supervision. Gaining or has attained full proficiency in a specific area of discipline. Typically requires 1-3 years of related experience. Sheetmetal Mechanic II Salaries in Helena, MTAlternate Job Titles:Intermediate Sheetmetal Mechanic, Sheet Metal Worker - Experienced, Sheetmetal Fabricator II, Sheetmetal Mechanic II
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Performs maintenance and service repairs on heating, ventilating, and air conditioning systems. Installs new units or replacement parts for existing units according to specifications and established safety guidelines. Follows blueprints or engineering specifications to install units. Performs troubleshooting to identify the cause of problems. Maintains and secures a spare parts inventory. Recommends purchasing maintenance equipment and supplies as required to improve processes and efficiencies. Typically requires an apprenticeship and/or completion of technical training. Requires a high school diploma. The regulations governing the location may require an HVAC Mechanical State License and EPA Section 608 Certification (CFC). Typically reports to a supervisor or manager. Works independently within established procedures associated with the specific job function. Has gained proficiency in multiple competencies relevant to the job. Typically requires 3-5 years of related experience. HVAC Mechanic III Salaries in Helena, MTAlternate Job Titles:HVAC Installation Technician III, HVAC Maintenance Technician III, Senior HVAC Mechanic, HVAC Mechanic III