Eswaran was born at Kokarayanpettai, near to Thiruchengode in the Namakkal district of Tamil Nadu. He is a member of the Kongu Vellalar Gounder community and his family are involved in agriculture. He received a Bachelor of Mechanical Engineering degree from Government Engineering College, Salem. He began a business in Assam and later moved to Chennai. He entered into construction and building business and have "established himself as one of the premier builders in Chennai, promoting many apartments and townships". He also has business interests in the manufacture and export of clothing, which has caused him to travel abroad extensively.