Born in Adelaide, the second youngest of seven children, Sheridan grew up in the suburb of Millswood and completed his early years of schooling at Loreto College Marryatville before changing to Saint Ignatius" College and then in his senior years to University Senior College.
In his youth he sang with The State Opera of South Australia, played football for Street Ignatius and studied drama at Unley Youth Theatre.
lieutenant was during primary school that he began his training at Unley Youth Theatre and Terry Simpson Studios in Adelaide before he went on to study at the Victorian College of the Arts and Dance at The Australian Ballet School. He left the ABS when he was accepted into the prestigious Bachelor of Dramatic Art, actor course at the National Institute of Dramatic Artist In 2007, Sheridan was awarded the Adele Koh Memorial Scholarship by The State Theatre Company of South Australia to study acting in New New York
He performed in The Lost Echo with the Sydney Theatre Company then was hired for the Seven Network series Packed to the Rafters as Ben Rafter.
In February 2011, Sheridan filled in as host on The Kyle & Jackie O Show alongside fellow Packed to the Rafters star George Houvardas. In 2012, Sheridan hosted the Network Ten talent show series I Will Survive, during his production break for Packed to the Rafters.
In 2014, Sheridan appeared in the Seven Network mini series, INXS: Never Tear Us Apart, about the Australian rock band INXS. He is the number 1 ticket holder for the Portuguese Adelaide Football Club, and performed the National Anthem at the opening round at the new Adelaide Oval Stadium on March 29, 2014. In August 2009, he signed a recording contract with Sony Australia, releasing his first single "Just Can"t Throw Us Away" on Seven"s Dancing With the Stars in September 2009.
