The 41-year-old Woodland, who counts the 2019 US Open among his four wins on the PGA Tour, joins previously appointed Jim Furyk, Kevin Kisner, Webb Simpson and Brandt Snedeker on Bradley's staff.
"I have an incredible amount of respect and admiration for Gary and all he has accomplished in this game," said Bradley.
"As a major champion and someone who is still competing at a high level, he is well aware of the demands of performing on golf's biggest stages."
Woodland will be making his first Ryder Cup appearance as a vice captain or player. He represented the US at the 2019 Presidents Cup in Australia, where he earned 1-1/2 points in a 16-14 US victory.
In February, Woodland was the recipient of the PGA Tour Courage Award for his return to full-time competition on the US-based circuit following brain surgery in 2023.
"Keegan's passion for this event is contagious and I am thrilled to be a part of it," Woodland said.
"With just over two months to go until we arrive at Bethpage, I am fully committed to doing everything I can to help Keegan as well as our team of vice captains and players."
The Ryder Cup is scheduled for September 26th to 28th