Trade · ONET 49-9041.00
Industrial Maintenance Technician
Keeps manufacturing equipment running: mechanical, electrical, and control system upkeep.
What the work looks like
Industrial maintenance techs keep production running. A shift mixes preventive maintenance rounds, breakdown response, troubleshooting PLC and drive faults, replacing bearings and seals, and sometimes programming the controls that run the line. Plants run across first, second, and third shifts; techs rotate between them depending on seniority.
Physical demands
- Lifting heavy motors and gearboxes
- Crawling into confined machine cavities
- Noise exposure (hearing protection required)
- Shift work including nights and weekends
- Pressure to restore production quickly
Common tools
- Multimeter and megger
- Oscilloscope and laptop for PLC troubleshooting
- Bearing pullers and hydraulic presses
- Alignment tools (dial indicators, laser)
- Pneumatic and hydraulic service tools
- VFD programming manuals and handhelds
Union and non-union paths
Union representation varies by plant: UAW, USW, IBEW, and others depending on industry. Non-union plants are common in the non-traditional manufacturing regions. Most maintenance techs develop their skill set equally well in either environment.
How to enter
Entry routes include two-year industrial maintenance programs at community colleges, the military (Navy nuclear, Army power generation), and direct hire as a helper. Recognized certifications include CMRP (Certified Maintenance and Reliability Professional) and NIMS for hydraulics and pneumatics.
Specialty paths in this trade
Most states license one industrial maintenance technician classification, but the work splits into distinct paths with different schedules, tools, and wage schedules. Read before choosing a program.
Mechanical Maintenance Tech
The core mechanical track: bearings, seals, couplings, gearboxes, pumps, compressors, and conveyors. The backbone of most plant maintenance departments.
Typical scope
- Preventive maintenance rounds on rotating equipment
- Bearing, seal, and coupling replacement
- Precision shaft alignment (dial indicator and laser)
- Pump, compressor, and gearbox rebuilds
- Conveyor and packaging-line troubleshooting
Entry: Community-college industrial maintenance AAS, manufacturer-sponsored apprenticeship, or direct hire as a helper with mechanical aptitude. NIMS credentials in hydraulics, pneumatics, and mechanical systems are commonly requested.
Wage note: Wage schedules vary by plant and sector. Food and chemical plants typically run above warehouse/distribution in the same metro.
Electrical Maintenance Tech
Industrial electrical scope inside the plant: motor controls, MCCs, transformers, lighting, and the electrical side of process equipment. Distinct from construction electrician work.
Typical scope
- Motor control center (MCC) troubleshooting and component replacement
- Three-phase motor troubleshooting, insulation testing (megger), and change-outs
- VFD programming, tuning, and fault diagnosis
- Plant lighting, branch circuits, and low-voltage distribution
- Energized work under NFPA 70E boundaries with arc-rated PPE
Entry: Industrial electrical AAS, manufacturer apprenticeship, or transfer from a construction electrician background. Many states allow industrial in-plant electrical work under a maintenance-electrician exemption separate from the construction license. Verify locally.
Wage note: Electrical maintenance typically sits above mechanical-only in the same plant's pay structure. Plants with large MCC and VFD fleets pay a premium.
Controls / PLC Tech
The programming and integration track. PLC ladder logic, HMI screens, SCADA tags, networked drives, and vision systems. The bridge between maintenance and controls engineering.
Typical scope
- Reading and modifying PLC ladder logic (Allen-Bradley, Siemens, others)
- HMI screen edits and alarm management
- Industrial networks: EtherNet/IP, Profinet, Modbus, DeviceNet
- VFD and servo drive configuration and tuning
- Troubleshooting vision systems, barcode readers, and safety PLCs
Entry: Prior mechanical or electrical maintenance experience plus vendor PLC training (Rockwell RSLogix / Studio 5000, Siemens TIA Portal). Some controls techs enter via a two-year mechatronics or automation degree.
Wage note: Controls techs typically sit at or near the top of the plant maintenance schedule. Integrator and systems-house roles often pay above in-plant rates but add travel.
Predictive Maintenance / Vibration Tech
The condition-monitoring track: vibration analysis, infrared thermography, ultrasonic leak detection, and oil analysis. Feeds the reliability program with data that schedules repairs before failure.
Typical scope
- Route-based vibration data collection and analysis on rotating equipment
- Infrared thermal surveys of MCCs, switchgear, and bearings
- Ultrasonic leak detection on compressed-air and steam systems
- Oil sampling and wear-particle interpretation
- Writing condition reports that drive PM scheduling
Entry: Journey-level mechanical or electrical maintenance background plus Vibration Institute Category I (and beyond). Infrared Thermographer Level I and ultrasonic-detection certifications commonly stack on top.
Wage note: PdM techs typically earn a premium over general maintenance in plants with a formal reliability program. Roving reliability contractors (IMI-style firms) pay by skill level plus travel.
Reliability Engineer (senior track)
The senior engineering track above the wrench. Owns asset strategy, PM optimization, root-cause analysis, and reliability KPIs across the plant or across multiple sites.
Typical scope
- Failure modes and effects analysis (FMEA) on critical assets
- Root-cause analysis on chronic and high-consequence failures
- PM program design and continuous improvement
- Reliability KPIs (MTBF, MTTR, OEE) and capital-request support
- Spares strategy and criticality analysis
Entry: Typically requires SMRP CMRP plus either an engineering degree or a deep maintenance-tech background with demonstrated reliability work. Some plants promote senior PdM techs into reliability roles without a four-year degree.
Wage note: Reliability engineer is a salaried role in most plants and sits above hourly maintenance. Multi-site and corporate-reliability roles pay above plant-level.
Residential, commercial, industrial
Industrial maintenance does not split residential vs commercial. It splits by plant type. The day, the pay, the cleanliness, and the safety regime all shift with the sector.
Certifications that unlock premium work
Credentials beyond the state license. Each one opens a specific segment of work where the qualified pool is smaller.
SMRP Certified Maintenance and Reliability Technician (CMRT) ↗
SMRP's technician-level credential for hands-on maintenance techs. Covers maintenance practices, preventive and predictive maintenance, troubleshooting, and documentation. Commonly requested at plants with a formal reliability program.
Issuer: Society for Maintenance and Reliability Professionals (SMRP)
SMRP Certified Maintenance and Reliability Professional (CMRP) ↗
SMRP's professional-level credential for reliability engineers, planners, and supervisors. Covers business and management, manufacturing process reliability, equipment reliability, organization and leadership, and work management. The recognized credential for the reliability engineer track.
Issuer: Society for Maintenance and Reliability Professionals (SMRP)
Rockwell Allen-Bradley RSLogix / Studio 5000 Training ↗
Rockwell is the dominant PLC platform in North American manufacturing. Studio 5000 (ControlLogix / CompactLogix) and legacy RSLogix 500 (MicroLogix / SLC) training is commonly required for controls scope on process and packaging lines.
Issuer: Rockwell Automation
Siemens SITRAIN ↗
Siemens' training program for SIMATIC S7, TIA Portal, and SINAMICS drives. Siemens is dominant in automotive, pharmaceutical, and many European-owned plants; SITRAIN is commonly requested in those sectors.
Issuer: Siemens
NFPA 70E Arc Flash Safety ↗
NFPA 70E is the consensus standard for electrical safety in the workplace and covers arc-flash hazards, incident energy, and PPE boundaries. Required or specified for most plant energized electrical work and a baseline expectation for the electrical maintenance and controls tracks.
Issuer: National Fire Protection Association
Vibration Institute Category I ↗
The entry credential for vibration analysis under ISO 18436-2. Qualifies the holder to collect route-based vibration data and do basic analysis on rotating machinery. The standard gate into the predictive maintenance / vibration tech track.
Issuer: Vibration Institute
OSHA 30 General Industry ↗
The 30-hour OSHA General Industry outreach course covers the core safety standards for manufacturing environments (as distinct from OSHA 30 Construction). Commonly required by plant EHS programs and by staffing agencies placing maintenance techs.
Issuer: OSHA-authorized outreach trainers
LOTO Authorized Worker ↗
Site-specific authorization under 29 CFR 1910.147 (The Control of Hazardous Energy) to apply and remove lockout-tagout on the plant's equipment. Not a national certification. Each employer trains and authorizes on their own written energy-control procedures. Non-negotiable for any hands-on maintenance scope.
Issuer: Employer (per 29 CFR 1910.147)
Tool and equipment investment
Apprentice, year 1
$300 to $700 for basic hand tools and a starter meter: combination wrenches, sockets, screwdrivers, pliers, allen keys, a basic multimeter, and a tool bag or box. Many plants supply specialty tools but expect the tech to own a basic personal set.
Journey level
$3,000 to $10,000 over time for a personal kit that matches the scope: infrared thermal imager, portable vibration meter, higher-end multimeter (CAT III/IV), clamp meter, ultrasonic leak detector on some teams, laser alignment tool where the plant allows personal units, and a spares kit of commonly used fasteners and consumables. Large gear (hydraulic presses, bearing heaters, full laser alignment rigs) is plant-owned.
Going independent
Industrial maintenance tends to stay W-2 in-plant rather than owner-operator. The 'independent' equivalent is moving into the industrial-contractor / roving-reliability route. Firms such as IMI (Industrial Maintenance and Integration) and similar regional shops place techs on turnarounds, shutdowns, and multi-site reliability contracts. Equipment is typically company-owned; personal investment looks more like premium certifications, travel gear, and sometimes a laptop loaded with vendor PLC software.
Plant-supplied tools vary by contractor and by sector. Ask during hiring which tools the plant provides, which come out of your pocket, and whether there is a tool allowance in the labor agreement.
Wages
National median
$63,760
annual, all workers
National mean
$67,160
annual, all workers
By pilot state
BLS groups industrial machinery mechanics with maintenance workers and millwrights. Demand is strong and geographic footprint tracks manufacturing density.
BLS OES code 49-9041 (Industrial Machinery Mechanics) provides statewide and metro median and mean wages. Pay tracks plant density and sector mix: metros with heavy process manufacturing (Gulf Coast chemical, Midwest food and auto), semiconductor fabs (Phoenix, Austin, Hillsboro), and large power-generation footprints typically pay above the national median. Warehouse-heavy metros without other industrial employers often pay below. Check the BLS OES metropolitan tables for your target area before relocating. Source: BLS OES 49-9041, https://www.bls.gov/oes/current/oes499041.htm.