The 32-year-old played an instrumental role in Cardiff City's runners up campaign in the 2008 FA Cup.
Speaking on the new signing, FC Pune City CEO Gaurav Modwel said, "Roger will partner Nickey (Shorey) and strengthen our defence. His vast experience of the English Premier League and Championship will be invaluable. He also has an eye for goal which will be an extra asset for us. We are delighted to have him in our team."
In his stint for over three seasons with the Welsh outfit, the central defender made 136 appearances, playing in an FA Cup final, winning Player of the Year and being named in the Championship Team of the Season. He then chose to take a step up to the top flight with Birmingham City in 2009.
Expressing his excitement Johnson said he is looking forward to his first stint outside of England.
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Johnson has played in the top flight in England for Wolverhampton Wanderers, Birmingham City and, most recently, West Ham United in the Premier League which was followed by a short stint at Charlton Atheltic. The 32-year old defender also is known to score goals at crucial moments.
His header in the Severnside Derby match against Bristol City in March 2008 was his seventh goal of the season. He played in all six of Cardiff's matches on their way to the FA Cup Final, in which they lost 1-0 to Portsmouth, and at the end of the season he was awarded the club's Player of the Year award.