Robert Dante Siboldi Badiola (born 24 September 1965) is a Uruguayan professional manager and former footballer.
A talented goalkeeper, Siboldi played most of his club career in Mexico and for the Uruguay national team between 1992-1997.
As a manager, Siboldi has been Liga MX champion twice, with Santos Laguna and Tigres UANL, respectively, in only three playoffs disputed.
Siboldi played professional club football in Uruguay, Argentina, Mexico, and Colombia.
On 2 June 2024, Siboldi's assistant was accused of leaking privileged information to rival club Monterrey.