 After being released by Hamilton Academical, Mensing went on trial with Morton for most of the summer 2012 pre-season, and played as a trialist in a 1–1 draw with his former club Hamilton.On 14 September 2012, Mensing signed for Raith Rovers on a one-year contract despite Hamilton offering him a new contract.On his debut against Airdrie United, he got the man of the match award and his performance was praised by manager Grant Murray.