Serves as a maintenance mechanic with in-depth experience, skill, knowledge and training
(“journey level”) abilities to perform predominantly new work as well as maintenance and repair
work on buildings, exterior and interior structures and related utilities, facilities and components.
Utilizes journey level trade skills primarily in at least two of the following trades at the WG-
10 level: Electrician, Air Conditioning Mechanic, Heating/Ventilation Mechanic, Industrial
Equipment Mechanic, Welder, Sheet Metal Mechanic, or, Electronics Mechanic.
a. Electrician. Installs, repairs, maintains, troubleshoots, tests, and loads new and existing
electrical lines, circuits, systems, and associated fixtures, controls, and equipment. Examples are
secondary power distribution lines and circuits used to supply a wide range of voltage, amperage,
phase, and frequency requirements, to distribution panels, switchgear, power and control circuits;
industrial multiphase systems; thermocouple sensors; electrical intrusion alarm and fire alarm
system; emergency warning systems; lighting protection systems; high intensity lighting systems
with associated controls; target mechanisms; AC and DC rectification systems; galvanic and
impressed current cathodic projection systems which prevent corrosion on underground or
submerged equipment and pipes; amplifier circuits; and related electrical equipment, for
complete systems in industrial complexes and buildings. Diagnose malfunctioning systems,
apparatus, and components, using test equipment and hand tools, to locate the cause of a
breakdown and correct the problem. Connect wires to circuit breakers, transformers, or other
components. Inspect electrical systems, equipment, and components to identify hazards, defects,
and the need for adjustment or repair, and to ensure compliance with National Electric Codes,
Unified Facilities Criteria, State and Local requirements, etc. Advise management on whether
continued operation of equipment could be hazardous. Test electrical systems and continuity of
circuits in electrical wiring, equipment, and fixtures, using testing devices such as ohmmeters,
voltmeters, and oscilloscopes, to ensure compatibility and safety of system.
b. Air Conditioning Equipment Mechanic. Installs, recognizes the cause of faulty equipment
and makes repairs on large systems that provide for a variety of air conditioning functions such
as heating, cooling, humidifying, dehumidifying, cleaning, filtering, and circulating. Systems are
used to support structures such as, warehouses, hangars, hospitals, and large office buildings and
complexes including those with areas that have special requirements such as communication
centers, electronic data processing centers, clean rooms, link training rooms, and other areas with
sensitive equipment. Review engineering blueprints, install air conditioning direct expansion and
chilled-water systems, test systems for proper functioning, reviews and adjusts system controls,
using Direct Digital Control (DDC) computer system, perform emergency repairs, maintain
tools, order supplies, and making routine adjustments to maximize operational efficiency.
Analyze data when inspecting systems, for temperature, fuel consumption, hours of operation,
etc. Perform minor repair of DDC components. Recover and properly dispose of refrigerants
(Ozone Depleting Substance) when servicing air conditioning equipment. Have a valid
Environmental Protection Agency Universal Certification for working with all types of
refrigerants at high and low pressures.
c. Heating & Boiler Equipment Mechanic. Installs, maintains, and repairs a variety of
complex industrial equipment and systems involving power steam, high, medium and low
pressure and temperature boilers with complicated components, critical requirements, and rigid
tolerances, using specialized test equipment. Incumbent repairs, troubleshoots, and maintains
single-and-multiple fuel power boilers and associated auxiliary and pollution control equipment
such as, industrial water treatment systems, chemical dispensers, electrostatic precipitators, bag
houses and ash removal equipment, and wet particulate scrubbers. Reviews and adjusts system
controls, using Direct Digital Control (DDC) computer system.
d. Industrial Equipment Mechanic. Installs, aligns, troubleshoots, repairs, overhauls, and
maintains various types of nonproduction industrial plant machinery, equipment, and systems.
Incumbent disassembles and repairs general industrial plant machinery, equipment, and systems
such as, towveyor and conveyor systems, bridge cranes, air compressors, engine and hydromatic
dynamometers, and similar equipment.
e. Electronics Mechanic. Installs, modifies, overhauls, maintains, troubleshoots, and repairs
electronics equipment of moderate complexity or a system of limited complexity. Follows
blueprints and manufacturers' specifications, uses handtools and specialized test instruments.
Electronic equipment serviced is usually self-contained and functionally independent such as,
color radar receivers and transmitters, video recorders, color video cameras/recorders, audio
recorders, two-way radios, multichannel very high frequency (VHF) or ultra high frequency
(UHF) transmitters or receivers, power supplies, and multilayered printed circuit boards.
Representative of systems of limited complexity are: public address, security monitoring and
access systems, closed circuit TV monitor systems, and personal computer systems. Sets-up and
operates computer controlled automatic test equipment to test and troubleshoot various
components and assemblies of electronic equipment or printed circuit boards. Calibrates testing
instruments and maintains records of repairs, calibrations and tests.
f. Welder. Welds a variety of metals and alloys. Uses a variety of manual welding processes,
e.g., several different gas torch processes, various electric arc processes including inert gas
shielded, or a number of both kinds of processes, to weld all types of metals and alloys of various
sizes, shapes, and thicknesses, including dissimilar metals such as, copper to steel. Processes
used are: oxyacetylene, oxyhydrogen, and other industrial gases. The arc processes used
(including inert gas-shielded ones) involve methods such as, gas metal-arc, gas tungsten-arc, gas
carbon-arc, plasma-arc, and atomic hydrogen welding. Welds in hard to reach places that must
meet close tolerance, strength, and other requirements e.g., evenness of fit and smoothness of
contour. Plans work by interpreting blueprints, determine welding position and type of metal to
be fused. Selects and set up welding equipment and ensure welds meet standards and engineering
design drawings and specifications.
g. Sheet Metal Mechanic. Develops patterns and lays out, cuts, forms, joins, assembles, and
installs items such as, heating, air conditioning, and ventilating pipes; conduits; drying ovens;
bulkheads; airframes; spars; air scoops; control and flying surfaces; and other items and systems
with combined straight and curved edges or irregular angles, planes, and curves. Plans, lays out,
and constructs manufactured items and systems with dovetailed, set-in bottom, burred-bottom,
wired, or lock seams. Works with various metals, including magnesium, honeycomb material,
alloys, stainless steel, and copper sheet.
May perform maintenance work in other trades not requiring journey level skills in trades such
as, Carpentry, Plumbing, Machining, Masonry, or Painting.