Sandy Henny Walsh (born 14 March 1995) is a professional footballer who plays as a defender for J1 League club, Yokohama F. Marinos.

[2] On 2 September 2012, he made his professional debut for Genk, coming on as a substitute for the final moments of a 2–2 draw with his former side Anderlecht in the Belgian Pro League.

[10] On 22 November 2022, Walsh received a call-up from Indonesia national team coach Shin Tae-Yong for a training camp in preparation for the 2022 AFF Championship.

On 24 January 2024, Walsh scored his debut goal in injury-time for the national team in a 1–3 loss against Japan in the final match of the 2023 AFC Asian Cup group stage.

[14][15] On 5 September 2024, in the first match of the third round of 2026 FIFA World Cup qualification, Walsh scored a goal against Saudi Arabia through a deflection from his teammate Ragnar Oratmangoen in a 1–1 draw.