"I am really delighted to be joining Aston Villa, a great club with such a big history, and for me this is a great step in my career," Senderos told Villa's official website.
"There will be a lot of competition for places with Ron Vlaar, Ciaran Clark, Nathan Baker and Jores Okore also very capable Premier League defenders, so it will be up to me to fight for and to earn my place in the team.
"This is a team and a club which wants to do better, I know this, and hopefully we can all develop together and create something special.
"My goal is to help the team keep as many clean sheets as we can and to help drive Villa where we deserve to be and want to be.
"I can develop further and continue to get better and this will be my goal - to continue to grow as a player, to help the team to grow and to contribute everything I can through the season."
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