Walter De Vecchi played for AC Milan in the 1974-1975 season and from 1978 to 1981, for a total of 102 matches played for the red&Black team of Gianni Rivera’s FIFA Ballon d’Or with whom he won the Italian Championship in 1979.
- At the moment he is part of the AC Milan Youth Sector leaded by Filippo Galli
- In 2012 he was the Coach of the first AC Milan U-14 Youth Team (Giovanissimi Nazionali)
- In 2013 he was the Coach of the second AC Milan U-14 Youth Team (Giovanissimi Regionali B)
- In 2014 he is the Coach of the first AC Milan U-14 Youth Team (Giovanissimi Regionali A)
- In 2015 he is the Coach of the AC Milan U-16 Youth Team (Allievi Nazionali)
- From 2016 to 2019 he is the Individual Session Coach of the AC Milan Youth Sector
- Since 2019 he is the Manager of the AC Milan Competitive Teams of the AC Milan Youth Sector (U15 / U16 / U17 / U18)