Diesel Locomotive Works (DLW) in Varanasi is a production unit of Indian Railways that manufactures diesel and electric locomotives. Trade Apprentices at DLW undergo practical training in their ITI trade for one to two years under the Apprentices Act 1961. They work in manufacturing shops, maintenance bays, and quality control departments. Completing the apprenticeship earns the National Apprenticeship Certificate (NAC), which is widely recognised.

DLW typically recruits Trade Apprentices in trades such as Fitter, Turner, Machinist, Electrician, Welder, Electronics Mechanic, Mechanic Diesel, Painter, and Attendant Operator (Chemical Plant). The number of seats per trade varies each year. Candidates must hold an ITI certificate in the relevant trade from an NCVT or SCVT-recognised institution. Some trades may also accept Class 10 pass candidates with additional conditions.

Under the Apprentices Act, Trade Apprentices at DLW receive a monthly stipend as fixed by the Government of India. For first-year apprentices, the stipend is typically ₹6,000–₹7,700 per month depending on the trade and duration. The stipend increases slightly for second-year apprentices. While this is not a permanent job, the training experience and NAC certificate significantly enhance employment prospects in both public and private sectors.

No, completing the Trade Apprenticeship at DLW does not guarantee a permanent government job. The apprenticeship is a training programme under the Apprentices Act, not a regular recruitment. However, ex-apprentices get additional marks (typically 10 marks) in RRB Group D and similar railway technical recruitment exams. They can also apply for Act Apprentice quotas in future RRB technical recruitments. The NAC adds value to any skilled worker's resume.

DLW Trade Apprentices must pass a basic fitness medical examination conducted at the works hospital before joining. The standard is not as stringent as A1 or B1 for permanent railway posts. Candidates must be physically fit to perform workshop duties, which involves working with heavy machinery. Colour vision is checked for certain trades involving electrical work. A clean fitness certificate from a registered medical practitioner is typically required at the time of document verification.