Welshman Donaldson will feature in the biennial event for the first time after a strong 2014 season, in which he has placed in the top five at five European Tour events, including his win at the inaugural Prague tournament this weekend.
The 38-year-old joins Rory McIlroy, Henrik Stenson and Victor Dubuisson in having secured the right to play at Gleneagles next month.
And in a year that has seen him rack up over €1.7million in prize money, Donaldson is determined to keep the good times going.
"This is big – it's been an amazing week," said Donaldson.
"I didn't get here until late; I needed to play well either this week or next week, or both, to guarantee my place in the Ryder Cup team so there was a lot on the line and this week I played really well, so that's great.
"Winning is everything: wins shoot you up world rankings, Race To Dubai, all sorts. It's massive - those three last holes coming in there were really tough with the wind blowing, so I'm just really happy to seal it.
"It's so difficult to get into the team, the lads are playing so well.
"You know that you have to play well to secure your place and it did come down to the wire. But that's how it is to get into the team – I played as well as I can play for 18 months, and then a couple of slow events and you rocket down the list, so it's great to come here and play so well and do enough to get into the team."