The former Saint and Swan will be moving back to Albury with family to coach Lavington in the Ovens and Murray Football League.
Schneider said he was grateful for the opportunities provided to him at the GIANTS since his arrival in 2018.
“I’m grateful for the opportunity the Giants gave me to coach at the elite level and I’ve loved my time working with such a great group of players,” Schneider said.
“Spending so much time away from home over the past two years was difficult. After some careful thinking, the time is now right for me to move out of the industry and begin the next chapter with my family.”
GIANTS General Manager of Football Jason McCartney paid tribute to Schneider in a statement on the club's website.
“Adam, like all our players and staff, sacrificed a lot in his dedication to our football program, particularly over the past two years,” McCartney said.
“His genuine care for the players and love of the club was consistently evident.
“We wish Adam and his family all the best with their move to Albury.”
The GWS coaching staff will now face a reshuffle with Mark McVeigh moving into an "elevated role", also responsible for team defence, with Amon Buchanan taking over midfield coaching duties.