The 24-year-old Swiss goalkeeper never played in a first-team game during his seven-and-a-half-year spell at Villa Park.
The 24-year-old, whose contract at Villa was set to expire this summer, has signed a two-year deal with the Liechtenstein-based club and is expected to compete with the long-serving Peter Jehle for the No. 1 spot at the Rheinpark Stadion.
Siegrist originally joined Villa from hometown club FC Basel in January 2009 and looked set for a bright future in B6 after proving an integral part of Switzerland’s 2009 Under-17 World Cup-winning side, earning the tournament’s Golden Glove award for the best goalkeeper.
However, the once highly-rated stopper's time in the Midlands was ultimately blighted by injuries, and despite impressing for the Under-18s and Under-21s, he never managed to make a first-team appearance for the claret and blues.
His future with the club looked to be in doubt last summer when he suffered a broken leg during a training session just a month before his contract expired, but the 6ft 4in keeper was later handed a lifeline when the club gave him a 12-month extension.
After building back to full fitness, he went on to spend several months on loan at National League North champions Solihull Moors this past season, making 12 appearances, before finishing the campaign with League Two's Wycombe Wanderers along with fellow Villa youngster Jerell Sellars.
He only featured once for the Chairboys, starting a 1-0 defeat to Accrington Stanley in April, but manager Gareth Ainsworth was impressed enough with his performance to reveal that the club would attempt to make his spell permanent this summer.
“I think he was outstanding and we have got a potential gem in Benjamin Siegrist now,” Ainsworth told the Bucks Free Press at the time. “It is all about this club and whether we can get players like that. I will be working hard in the summer [to do that].”
Siegrist ultimately chose a move to Vaduz over joining Wycombe permanently, though, and will now be hoping that a fresh start back in Central Europe can help him recapture the promise he once showed as a teenager.