Later in the 2004–05 season, Onuora became a coach and youth development officer at Swindon Town. When Andy King was sacked after a poor start to season 2005/06, Onuora was appointed as Swindon's caretaker manager. In December 2005, Ron Atkinson, who had previously been fired from TV jobs for making racist remarks, was reportedly appointed to work alongside Onuora – one of the league's few black managers. Onuora later denied that this was the case, claiming that Atkinson was at the club to film a fly-on-the-wall documentary called "Big Ron Manager".