PRAGUE, August 24, 2014 (AFP) - The 38-year-old Welshman required a top seven finish to make it on to Paul McGinley's European team to face the United States at Gleneagles.
And the world number 29 did so in style.
Lying two shots off leader and compatriot Bradley Dredge in a share of second overnight, he fired a final round four-under-par 68 for a 14-under total 274 to claim his third EPGA title.
Dredge came second for the second successive week, his fourth round 72 leaving him two shots away, with Denmark's Soren Kjeldsen and South African Merrick Bremner in a share of third, a further shot adrift.
Compensation for Dredge for missing out on the win came in the knowledge that he had earned enough this season to regain the playing card he lost in 2012.
Donaldson rattled off three birdies on the opening holes to give him the lead with Dredge dropping a shot at the first.
A bogey at the fourth for Donaldson opened the door for Kjeldsen but he was back in front at the turn.
Another Ryder Cup hopeful, Stephen Gallacher, finished in a share of seventh after a 73 and is likely to need a good performance at next week's Italian Open to sneak an automatic place via the world list.
Collated fourth and final round scores in the Czech Masters at the Albatross Golf Resort, Prague, on Sunday (GBR/IRL unless stated, par 72):
274 - Jamie Donaldson 66 69 71 68
276 - Bradley Dredge 68 70 66 72
277 - Soren Kjeldsen (DEN) 68 70 68 71, Merrick Bremner (RSA) 70 68 70 69
280 - Tommy Fleetwood 72 65 73 70, Eddie Pepperell 70 72 71 67
281 - Sam Walker 69 71 70 71, Stephen Gallacher 70 67 71 73
282 - James Heath 73 70 71 68, Garrick Porteous 70 67 72 73, Peter Hedblom (SWE) 70 68 73 71, Scott Jamieson 71 73 74 64
283 - Craig Lee 69 71 71 72, Javier Colomo (ESP) 69 71 71 72, Matthew Baldwin 72 71 67 73, Danny Willett 68 75 72 68, Kenneth Ferrie 68 71 71 73, James Morrison 70 68 72 73
284 - Peter Uihlein (USA) 70 73 72 69, Paul Waring 68 71 70 75, David Lipsky (USA) 69 71 69 75, Tim Sluiter (NED) 69 73 70 72
Selected
285 - Felipe Aguilar (CHI) 73 71 70 71, Paul Lawrie 70 70 71 74, Kevin Phelan (USA) 72 69 73 71, Gregory Bourdy (FRA) 69 67 71 78
287 - Tain Lee (USA) 72 68 72 75, Hennie Otto (RSA) 70 71 76 70, Shiv Shankar Prasad Chowrasia (IND) 68 75 68 76, Dodge Kemmer (USA) 71 70 78 68
288 - Shiv Kapur (IND) 71 70 75 72, John Hahn (USA) 68 69 76 75, Haydn Porteous (RSA) 74 70 69 76, Peter Lawrie 72 72 73 72, Keith Horne (RSA) 68 74 74 73
290 - Gaganjeet Bhullar (IND) 72 71 71 76
291 - Sihwan Kim (KOR) 74 67 73 77, Dylan Frittelli (RSA) 72 70 75 74, Jason Knutzon (USA) 70 71 74 76
293 - James Kingston (RSA) 76 68 72 77