The Oakland Athletics have hired Sandy Alderson as Senior Advisor to Baseball Operations, the club announced Tuesday. 
"I am thrilled to welcome Sandy as a Senior Advisor to Baseball Operations," said Billy Beane, A's Executive Vice President of Baseball Operations. "His mentorship and friendship have been invaluable to me over the course of my career, and I look forward to the expertise and perspective he will add at every level of the organization. David and I couldn't be more excited to bring him back to Oakland."
"I am really excited to return to the A's and the Bay Area," said Alderson. "I look forward to being as helpful as I can to Billy, David, and the rest of the Baseball Operations staff."
This will be Alderson's 18th season with the A's. He joined the Club as General Counsel in October 1981 and was named Executive Vice President, Baseball Operations in 1983. He was the architect of the A's three straight American League Pennant-winning clubs from 1988-90, including a World Championship in 1989. He served as General Manager through 1997 and was also President from 1993-95 and 1997-98.
Following his time in Oakland, Alderson served as Major League Baseball's Executive Vice President of Baseball Operations from 1998-2005, the San Diego Padres Chief Executive Officer from 2005-09, special consultant to Baseball's Commissioner for Latin America in 2010, and New York Mets General Manager from 2011-18.
Alderson received his bachelor's degree from Dartmouth and his Juris Doctor from Harvard Law School. He served as a Marine Infantry Officer for four years with a tour of duty in Vietnam. He and his wife, Linda, have two children and five grandchildren.