Pipefitter / Steamfitter

Plumbers install, maintain, and repair water supply lines, drainage systems, gas lines, and related fixtures in residential, commercial, and industrial buildings. The work involves reading blueprints and building codes, measuring and cutting pipes, assembling and installing pipes and fittings, testing systems for leaks using pressure gauges, and troubleshooting problems that range from simple clogs to complex system failures. Plumbers work in diverse environments—from new construction sites to century-old buildings with outdated systems—requiring them to adapt their approach to each unique situation. The job demands physical stamina for working in cramped spaces, excellent problem-solving abilities for diagnosing issues that aren't immediately visible, and strong customer service skills for explaining technical problems to homeowners. Many plumbers specialize in areas like gas fitting, medical gas systems, fire sprinklers, or green plumbing technologies.

HVAC technicians install, maintain, and repair heating, ventilation, air conditioning, and refrigeration systems in residential, commercial, and industrial buildings. The work involves reading blueprints and technical specifications, installing ductwork, piping, and electrical components, charging systems with refrigerants, testing system performance, diagnosing malfunctions using specialized tools, and performing preventive maintenance. Modern HVAC work increasingly incorporates smart thermostats, zoning systems, and building automation integration. Technicians must understand electrical systems, plumbing principles, refrigeration cycles, airflow dynamics, and indoor air quality. The job varies between routine maintenance visits, new construction installations, and emergency repair calls for systems that have failed during extreme weather. Specializations include commercial refrigeration, industrial climate control, clean room environments, and energy efficiency optimization. Physical demands include working in tight spaces like attics and crawlspaces, handling heavy equipment, and exposure to temperature extremes.

Welders join metal parts together using various welding techniques including MIG, TIG, stick welding, and flux-cored processes. The work spans construction, manufacturing, shipbuilding, aerospace, pipeline, and repair industries. Welders read blueprints, calculate dimensions, inspect structures for defects, select appropriate materials and methods, prepare metal surfaces, operate welding equipment, and verify weld quality through visual inspection and testing. Advanced positions involve welding exotic metals, working on pressure vessels, or performing structural work requiring certification to specific codes. Work environments vary dramatically—from climate-controlled fabrication shops to outdoor construction sites, underwater structures, and confined spaces. Physical demands include prolonged positioning, exposure to heat and fumes, and wearing protective equipment. Career advancement includes specialized certifications, inspection roles, and welding engineering positions.