In November 2013, he joined Burton Albion on a one-month deal but was an unused substitute throughout his time at the Pirelli Stadium.
But a few months later, the Swiss stopper joined Conference side Cambridge United.
He made three appearances and conceded just one goal before a groin injury ended his spell.
The Basel-born custodian has been capped by Switzerland at every level up to U21.
He was part of the Swiss squad at the 2012 London Olympic Games.
But his finest achievement at international level came during the 2009-10 season, when he won the World U17 Cup in Nigeria.
Siegrist walked away with the Golden Gloves award for the tournament's top goalkeeper.