Following his retirement, Aizlewood worked as an assistant manager with Carmarthen Town on two occasions and later worked as assistant manager to Ian Rush at Chester City. He also spent two years as the technical director of the Welsh Football Trust, being placed in charge of developing youth football in Wales. In 2012, he returned to Welsh Premier League side Carmarthen Town as manager and lead the club to consecutive Welsh League Cup victories in 2013 and 2014. His contract as manager was terminated after he was convicted of serious fraud in February 2018.