UPSC IES Eligibility Criteria – Indian Engineering Services Preliminary, Mains 1. Nationality: Candidates must be one of the following: A citizen of India. A subject of Nepal or Bhutan. A Tibetan refugee who came to India before January 1, 1962, with the intention of permanently settling in India. A person of Indian origin who has … Continue reading Age Limit For IES – UPSC Indian Engineering Services