Dioh Williams was one of several Liberian footballers who were brought to Sweden by Floda BolF by manager Stig Johanasson in the late 1990s after having been discovered at the Gothia Cup.

These Liberian players included Dulee Johnson, Natus Ponnie, Jimmy Dixon and Sethen Hills.

In the summer of 2007, Dioh transfer from BK Hacken to Danish Superliga club AGF Aarhus for 1,10 Million euros and signed a 4 years contract.

Dioh was loaned from AGF Aarhus to Russian Premier League club Alania Vladikavkaz during the 2010–2011 season.

On 14 February 2014, Dioh transfer from BK Hacken to Gefle IF for an undisclosed fee and signed a three-year contract.