Jimenez played this event in preference to a major on the Champions Tour, no doubt keen to support the game in his own country.
In the process, the 50 year old Spaniard made it double cause for celebration by winning, for the first time in 27 attempts, his own national open.
Jimenez surpasses the previous oldest winner of a European Tour event, himself, when winning the Hong Kong Open last December.
For Jimenez, who finished 4th at the recent Masters and soon after won on debut on the Champions Tour, it continues a purple patch of form and he can now look forward to playing a key role in Europe's defence of the Ryder Cup at Gleneagles in September.
Jimenez needed only to par the first extra hole of the playoff although perhaps Richard Green can feel the most hard done by on day four having triple bogeyed the 14th when appearing on track to win his fourth European Tour title more than three years after his third and 17 years after his first in Dubai in 1997.
Green has played a limited schedule of late, this only his 7th European Tour event of the 2014 season, the Ã¢Â‚Â¬120,000 no doubt a great boost for him.
Wade Ormsby was the only other Australian in the field and he finished 15th.