- technical course graduate (mechanical technology, plant maintenance, industrial maintenance). -certification from TESDA Plant Maintenance NC II / NC III or other mechanical/industrial courses. ? Experience / Work Background -Many job postings require some years of relevant experience (e.g. 2–5 years) in plant/mechanical maintenance, preferably in industrial/manufacturing settings. -For simpler or entry-level maintenance roles, 1–2 years may be acceptable, provided with right training/certification.