How to get hired
"Maintenance engineer" covers three different jobs. Decide which one you are applying for, because the interview, the shift pattern and the growth path all differ.
Plant maintenance
You look after the machines in one plant: presses, CNCs, compressors, conveyors, utilities (boilers, chillers, DG sets, cooling towers). Manufacturers hire GETs and DETs into maintenance, and many ITI fitters and electricians grow into it. Interviews test what actually breaks: bearing failure causes, hydraulic circuit reading, pneumatic valve symbols, motor starter wiring, alignment, lubrication schedules. Expect to be asked, "A machine trips every hour. What do you check first?" Walk through it in order: symptoms, history, safe isolation, then the likely causes.
Safety basics are part of the job description, not an extra: permit to work, lockout-tagout (LOTO) and job safety analysis. Say how you would isolate a machine before you say how you would repair it.
OEM field service
Equipment makers (compressors, elevators, HVAC, CNC machines, medical and lab equipment, power electronics) hire Service Engineers and Field Service Engineers to install, commission and repair their products at customer sites. This is the friendliest route for freshers who like travel: you get product training, a territory, and often a two-wheeler or travel allowance. The tests are product basics plus a lot of attitude questions, because you will face angry customers alone.
Facility and building maintenance
Hotels, hospitals, malls, data centres and large offices run engineering teams for HVAC, electrical distribution, fire systems, lifts and water treatment, often through facility management companies. Titles: Shift Engineer, Engineer – Maintenance, Chief Engineer. Chiller and HVAC knowledge, a state electrical licence and DG set experience matter more than your degree class here.
Licences and certificates that employers name
- Electrical supervisor or wireman licence from your state's electrical licensing board, for anyone signing off electrical work
- Boiler Operation Engineer (BOE) certificate of proficiency, now under the Boilers Act, 2025 and the Boiler Operation Engineers' Rules, 2025, for engineers in charge of larger boilers; your state's boiler directorate conducts the exam, so check its eligibility and experience rules
- Vibration analyst Category I or II (ISO 18436-2) for condition monitoring roles
- CMRP from SMRP, for engineers already four or five years in who want reliability manager roles
- SAP PM (plant maintenance module) as a working skill: raising notifications, work orders and spare reservations
A NATS apprenticeship in a plant's maintenance department is a sound start if you didn't get placed; register on the NATS portal.
Breakdowns, nights and what changes with seniority
Plant maintenance runs round the clock. You will be on a rotating shift or on call, and a line stoppage at 3 a.m. means your phone rings. The work is physical and dirty, and pressure from production during a breakdown is real; the maintenance team gets blamed for downtime and rarely thanked for uptime. Field service means travel, sometimes two or three nights a week in a new town, and on-call weekends.
The ladder: Engineer – Maintenance or Service Engineer, Senior Engineer, Assistant Manager – Maintenance, Maintenance Manager, then Head – Engineering or Plant Engineering Manager. The pay jump comes when you stop being the fastest fixer and start running planned maintenance: MTBF and MTTR numbers, spare parts planning, TPM pillars, root cause analysis that stops repeat failures. Reliability engineer roles in large process plants and data centres pay noticeably more than breakdown roles.