Donald Joseph O'Riordan (born 14 May 1957) is an Irish football coach and former professional player, who most recently was the manager of Women's National League club Treaty United.
O'Riordan notably played for Middlesbrough, Grimsby Town and Notts County amongst others and has previously been on the coaching staff at Sheffield United, in the role of technical director/coach of their feeder club Chengdu Blades F.C.
In his first season as manager, a young Torquay side made the Division Three play-offs and lost the semi-final against his old club Preston North End.
The game will be remembered for a wrong decision by the referee to send off the Torquay defender Darren Moore which gave Preston an advantage and they went on to score four times to win 4–1 and 4–3 over the two legs.
Torquay accepted offers for many of the young players developed by O'Riordan during his time in charge but his two Caribbean signings Bajan international Gregory Goodridge and Rodney Jack the Saint Vincent National Team player brought in a reported one million pounds in transfer fees between them selling Goodridge to QPR before and Jack to Crewe after his departure.
O'Riordan guided Gloucester's very young Reserve team to a Cup Final victory when he played in the win against local rivals Cheltenham Town.
After a loan spell at Dorchester Town he left Gloucester, having been appointed as manager of Irish side Galway United in the summer of 1997.
It reaped immediate rewards, as they were the first team from the West of Ireland to win a national cup at any juvenile level, in what was their first year of existence, when they defeated St Josephs of Dublin in the historic under 17 final, in Terryland Park.
His influence was seen during the buildup games just prior to the start of the tournament when China crushed Australia 5–0 and drew 0–0 with the eventual Olympic Champions the United States.
Having done so well in the group stage the Chinese lost to Japan in the quarter final and so ended their dream of gold on home soil.
O'Riordan's input was publicly appreciated by the Women's Head Coach Shang when he spoke to the press after the tournament had finished.
He spent the week working with the team helping the Head Coach August Makalakalane and South Africa won the first leg 6–0 in Johannesburg.
He resigned from FCNY in July 2010[8] In January 2011 O'Riordan was appointed as Advisor to the Beijing Baxi FC professional women's team and helped them to finish 5th and reached the FA Cup Final losing to League Champions Shanghai.
On 16 June 2014, it was announced that O'Riordan would take up the position of manager of Women's National League (WNL) club Galway WFC.