The Spanish central defensive midfielder last represented Delhi Dynamos in the 2016 edition of ISL.
FC Pune City CEO Gaurav Modwel said, "Marcos is a great addition to our team. He brings in a wealth of experience of playing at top level in Europe coupled with his stint in ISL. With his technical abilities and great defensive work rate, he will control the midfield and be the link to our forward line."
Tebar is a product of the famed Real Madrid Academy.
During his stint at Real Madrid, he represented Real Madrid Castilla (B Team) mostly. The Madrid-born player later represented Rayo Vallecano, Segunda Division side Girona FC and Almeria before a spell in 2016 at Brentford in England. He has been capped by Spain at the under-17 levels playing alongside Cesc Fabregas and David Silva at the U-17 World Cup and European Championships.
Commenting on the signing, head coach Antonio Habas said, "Marcos' experience of playing at top-flight clubs in Europe will be very useful for the team. His approach to the game is very tactical and at a time when we are forming a new core team, his presence will hopefully make a difference.