The candidate must be one of the following:
- A citizen of India
- A citizen of Nepal or a subject of Bhutan
- a person of Indian origin who has migrated from Pakistan, Myanmar, Sri Lanka, Kenya, Uganda, Tanzania, Zambia, Malawi, Zaire, Ethiopia or Vietnam with the intention of permanently settling in India.
21–30 years on 1 January of the year of Engineering Services Examination.
Upper age limit relaxation is provided to candidates as follows:
- A maximum of Three years for OBC candidates [Non Creamy Layer only]
- A maximum of Four years in case of Defense Services personnel disabled in operations during hostilities with any foreign country or in a disturbed area and released as a consequence thereof
- A maximum of five years for candidates belonging to a Scheduled Caste or a Scheduled Tribe
- A maximum of five years if a candidate had ordinarily been domiciled in the State of Jammu & Kashmir during the period from 1 January 1980 to 31 December 1989
- A maximum of five years in case of ex-servicemen including Commissioned Officers and ECOs/SSCOs who have rendered at least five years Military Service as on 1 August and have been released on either of the following basis:
- on completion of assignment (including those whose assignment is due to be completed within one year from 1 August) otherwise than by way of dismissal or discharge on account of misconduct or inefficiency
- on account of physical disability attributable to Military Service
- on invalidment
- A maximum of five years in case of ECOs/SSCOs who have completed an initial period of assignment of five years Military Service as on 1 August and whose assignment has been extended beyond five years and in whose case the Ministry of Defense issues a certificate that they can apply for civil employment and that they will be released on three months notice on selection from the date of receipt of offer of appointment.
- A maximum of ten years in case of blind, deaf-mute and orthopaedically handicapped persons
The age relaxation will not be admissible to Ex-Servicemen and Commissioned Officers including ECOs/SSCOs who are released on own request.
A degree in Engineering from a recognised university or equivalent. M.Sc degree or its equivalent with Wireless Communications, Electronics, Radio Physics or Radio Engineering as special subjects also acceptable for certain Services/posts only.
Candidates appearing at their engineering degree or equivalent examination are also eligible to compete. Candidates qualifying on the result of the written part of the Examination will be required to submit the proof of passing the requisite examination along with their detailed application form to be filled up at that stage.