Siegrist has just helped his country qualify for the U17 World Cup final after they defeated Colombia 4-0 in the semi-final.
The tall teenager, who names Gianluigi Buffon as his hero, says he's thoroughly enjoyed playing for Villa, since joining the club at the start of 2009.
He said: "I can tell you that the training is really hard and demanding. I'm very happy in England and I hope to be able to play in the Premier League with Villa one day.
"I love the English league, and with all the crosses and aerial play it's perfect for goalkeepers."