Heavy Equipment Mechanic III

  • North Charleston, South Carolina
  • Jun 04, 2022
Full Time Construction and Skilled Trades
  • Salary: $54,017.00 - $73,465.00 Annually USD

Job Description


Employee in this position Performs complex diagnosis, electrical and mechanical repair, and maintenance on County trucks, ambulances and other related vehicles; performs directly related work as required. The work is performed under the direction of the Heavy Equipment Shop Supervisor, but considerable leeway is granted for the exercise of independent judgment and initiative. This III class differs from the Heavy Equipment Mechanic II as this level exercises an instructional and supervisory role in heavy equipment shop activities. Incumbents in this class have demonstrated an increased level of technical expertise, dexterity in a wide variety of heavy equipment systems troubleshooting and repairs, a broader scope of responsibility due to the performance of a more complex set of job duties, and the assignment of supervisory duties.

HIRING HOURLY RANGE: $25.97 - $35.32
HIRING SALARY RANGE: $54,017 - $73,465 (Estimated Annual Salary)

APPLICATION PROCESS: Submitted applications are reviewed by the hiring department, on an ongoing basis.

Duties and Responsibilities

Duties include:

  • Exercises a supervisory and instructional role in various heavy equipment shop activities.
  • Possess an increased level of technical expertise and skills dexterity in a wide variety of heavy equipment systems troubleshooting and repairs.
  • Performs a broader scope of responsibility due to the performance of a more complex set of job duties, and the assignment of supervisory duties.
  • Supervises Heavy Equipment Mechanic II and I personnel.
  • Provides for an effective training and apprenticeship program for Heavy Equipment Mechanic I personnel.
  • Performs a wide range of repair and maintenance procedures on heavy equipment, trucks, and ambulances, including, engine overhauls, transmission, and repairs of heating and air systems, body work, brake and frame maintenance, suspension, tires and other related vehicles and equipment.
  • Diagnoses and repairs electrical and electronic components and accessories on all types of equipment.
  • Performs welding and fabrication duties when necessary.
  • Performs shop equipment maintenance and repair and cleaning duties as necessary:
  • Discusses vehicle problems with operators in order to identify problems and explain what work may be required.
  • Inspects, tests and repairs vehicle electrical charging systems such as alternators, regulators and batteries.
  • Completes a schedule of preventive maintenance by testing equipment to ensure readiness for use.
  • Prioritizes repairs to be completed based on adequate coverage of services to ensure that there is minimal disruption to work services.
  • Performs structural and equipment repair and maintenance at related facilities.
  • Maintains records on maintenance activities.
  • Provides on-call backup support for after-hours repairs to EMS ambulances and Environmental Management equipment, as needed.
  • Responds to questions, comments, and requests in a courteous, timely manner.
  • Provides needed information and demonstrations concerning how to perform certain work tasks to new employees in the same or similar class of positions.
  • Keeps immediate supervisor and designated others fully and accurately informed concerning work progress, including present and potential work problems and suggestions for new or improved ways of addressing such problems.
  • Attends meetings, conferences, workshops and training sessions and reviews materials to become and remain current on the principles, practices and new developments in assigned work areas.
  • Communicates and coordinates regularly with others to maximize the effectiveness and efficiency of interdepartmental operations and activities.
  • Performs other directly related duties consistent with the role and function of the classification.
  • May be designated to report to work during hazardous weather or emergency conditions.

Minimum Qualifications


  • Graduation from High School or possession of a GED, supplemented by training in heavy equipment repair; and
  • Formal attendance at Supervisory skills development and instruction; and/or
  • Attendance at formal leadership development courses; and
  • Have advanced diagnostic and technical skills on a wide variety of heavy equipment.
  • 7-10 years of experience in heavy equipment maintenance and repair, including extensive manufacturers' training and technical school training and hands-on experience with extensive major component repairs and rebuilds; or
  • Any equivalent combination of experience and training which provides the knowledge, skills and abilities necessary to perform the work; and
  • Master ASE Certification in Medium-Heavy Duty Trucks; and
  • Advanced manufacturer's factory certifications; and
  • Must undergo continuous in-house training and training from manufacturers and vendors as a condition of continued employment; and
  • Supervisory formal course completion; and
  • Must possess South Carolina driver's license showing a clean DMV record, and position may require a Commercial Driver's License (CDL).

Knowledge, Skills and Abilities

  • Comprehensive knowledge of the modern principles, practices, methods, tools, materials and diagnostic equipment associated with the maintenance and repair of heavy equipment.
  • Comprehensive knowledge of the principles, practices and operations of internal combustion engines, both gasoline and diesel.
  • Comprehensive knowledge of electronics and computer systems in automotive vehicles and heavy equipment.
  • Comprehensive knowledge of the principles and practices of automotive hydraulics and hydraulic systems repair.
  • Comprehensive knowledge of the servicing and repair of air brakes and systems.
  • Comprehensive knowledge of power steering and automotive air conditioning controls and systems.
  • Comprehensive knowledge of both manual and automatic transmission operations and repair.
  • Comprehensive knowledge of differential assembly repair and maintenance.
  • Comprehensive knowledge of repair methods of suspension systems.
  • Comprehensive knowledge of safety precautions and procedures relating to mechanical equipment repair and maintenance operations.
  • Comprehensive knowledge of welding and fabrication techniques.

  • Skilled in supervisory competencies.
  • Skilled in the use and maintenance of tools employed in all phases of vehicle maintenance and repair.
  • Skilled in diagnosing mechanical and vehicle malfunctions and determine appropriate maintenance and repair needed.
  • Skilled in reading and following wiring and related diagrams.
  • Able to communicate effectively with others, both orally and in writing, using both technical and nontechnical language;
  • Able to perform a wide variety of duties and responsibilities with accuracy and speed under the pressure of time-sensitive deadlines;
  • Able to use logical and creative thought processes to develop solutions according to written specifications and/or oral instructions.
  • Able to understand and follow oral and/or written policies, procedures and instructions.
  • Able and willing to quickly learn and put to use new skills and knowledge brought about by rapidly changing information and/or technology.
  • Able to use integrity, ingenuity, and inventiveness in the performance of assigned tasks.
Closing Date/Time:

Job Address

North Charleston, South Carolina United States View Map