Jon was appointed in 2008 to lead Ireland through the qualifying tournaments (in Denmark, Poland, and Germany), which he did successfully.
Jon has previously captained and coached the DHL Exiles Sevens to some notable victories in recent seasons.
The captain will be Kieran Campbell, the former Ireland scrum half, now plying his trade with Connacht, but a West Londoner (and London Irish man) by upbringing.
The Exiles wish them - and the squad - well in their endeavours.
You can keep up to date with all the action from the Rugby World Cup 7s in Dubai online.
On demand coverage of every match played on the main pitch in Dubai, plus selected matches from pitch 2 on demand video will be steamed live in low (250) and high (500) bit rates in flash format, so users with PCs and Macs can all enjoy the action.