He failed to establish himself in the first-team and left the club in January 2013, ending the 2012–13 season at non-league sides Nantwich Town and Witton Albion.
[5][6] Oswell was handed a one-year professional contract at Gresty Road and sent out on loan to Welsh club Rhyl for the first half of the 2011–12 season.
[7][8] After a strong start during his spell at Belle Vue, scoring six goals in his first ten appearances, he was named as Cymru Alliance player of the month for October.
[10] On 28 June 2012, Oswell joined Scottish Premier League side Inverness Caledonian Thistle, who were managed by former England international Terry Butcher.
[17] Oswell signed for Australian National Premier Leagues NSW club APIA Leichhardt Tigers in May 2013, making his debut later that month against the Rockdale City Suns.
[18] He helped the Tigers to win the 2013 edition of the Waratah Cup, scoring a hat-trick against the Central Coast Mariners Academy in the quarter-finals, and then the opening goal in the 3–0 victory over Sutherland Sharks in the grand final at Seymour Shaw Park.
[22] He finished as the club's top scorer in the 2014–15 season after scoring 20 goals in 37 appearances, and was named on the Welsh Premier League Team of the Year.
[38] It proved to be an astute signing, as Oswell scored 28 goals in 47 games, including hat-tricks against Leamington, North Ferriby United and Spennymoor Town.
[39][40][41] County qualified for the National League North play-offs with a fifth-place finish, but were beaten 1–0 by Chorley at Edgeley Park at the semi-final stage.
[23] As part of his final placement for university, Oswell travelled to Uganda with a charity group to help children with neurological conditions.