After retiring in 2017 at the age of 36, De Muner became a manager.[3][4]
In the summer 2019, De Muner was hired as manager for Defensa y Justicia's reserve team.[5] On 22 January 2020 the club announced, that first team manager Mariano Soso had left the club and De Muner would take charge of the team temporarily.[6]
Personal life
De Muner's cousin, Leandro, was also a footballer.[7]