Senderos, who was released by Fulham at the end of last season, is currently part of Switzerland's World Cup squad and says he is thrilled to be returning to the Premier League with Paul Lambert's side.
|ASTON VILLA LATEST
|11/4||Aston Villa are 11/4 with bet365 to be relegated next season|
"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."
Manager Lambert, meanwhile, feels the Swiss international can bring experience and strength to a Villa backline that shipped 61 Premier League goals last season.
"He's played for some top sides and was a big influence in Arsenal's run to the Champions League final in 2006, so we're bringing in a really experienced player who's been there and done it and that will be important for the team," he added.
"I went to Switzerland not long ago to watch the national team train and I could see he has a good, strong mentality for the game. Ottmar knows players and for him to say that Philippe has never disappointed him on the pitch, that's no small commendation.
"This will be Philippe's third World Cup finals and there aren't too many players who compete at that level over that stretch of time. He'll be a great addition to the group."