Vaccaro, 64, has founded some of the most renowned and respected grassroots basketball programmes in the US, among them the ABCD Camp, Big Time Tournament and the EA Sports Roundball Classic.
As part of the agreement, Reebok will now sponsor these events.
Vaccaro will be Reebok's senior director of grassroots basketball and will report to Tom Shine, senior vice president of sports marketing for Reebok.
Widely considered one of the most formidable forces in contemporary basketball marketing, Vaccaro has spent more than 40 years connecting with youth at the grassroots level.
A keen observer of both up-and-coming talent and promising marketing opportunities, Vaccaro played an integral role in securing marketing endorsements for some of the NBA's top players.
Said Paul Fireman, chairman and chief executive officer, Reebok International Ltd: "Grassroots basketball is one of the most exciting and relevant elements of youth culture. With Sonny on our team, we can develop this initiative to a level of significance that firmly positions Reebok for long term and sustainable growth in this critical area.
"Our commitment to the NBA to enhance its brand through strategic and effective product and marketing programmes has resulted in Reebok connecting to professional basketball at a level never before achieved."
In 2001, Reebok and the NBA formed a long-term strategic partnership.
Currently, Reebok has the exclusive rights to design, market and sell NBA apparel for 19 of the 29 NBA teams.
Beginning with the 2004-2005 season, Reebok will have the exclusive rights to create on-court apparel for all 30 NBA teams, as the expansion Charlotte Bobcats will join the league in that season.
Despite its position, however, it is still some distance behind the giants of sports marketing – adidas and Nike.
