Mejo was born to Joseph and Rosemary, belonging to a Roman Catholic Syrian Christian family from Thrissur, Kerala, on 28 January 1981.
Mejo did his Bachelors Degree in Commerce from Christ College, Irinjalakuda and he completed his education with the Masters Degree in Business Administration in Marketing and Finance from Sree Saraswathi Thyagaraja College, Pollachi.
He is also a diploma holder in Sound Engineering from the Riyan Institute of Film Technology, Ernakulam.
Slowly, yet steadily, he climbed the ladder to become one of the most loved music composers in the South Indian Film Industry.
Mejo has been an Executive Member of the FEFKA Music Directors Union (FEMU) and currently holds the position of the Vice President for the same.