Galeano worked as an assistant at
Sol de América,
Sportivo Trinidense,
Deportivo Liberación and
River Plate Asunción. On 9 June 2019, he replaced
Ricardo Torressi at the helm of
Fulgencio Yegros. In September 2019, Galeano was sacked by Fulgencio, and subsequently returned to an assistant role at River Plate. On 7 December 2020, he was named caretaker manager of the latter side for the remainder of the year, replacing
Carlos Aitor García. On 6 December 2020, Galeano agreed to become the manager of
2 de Mayo for the upcoming season. He was dismissed on 26 May, after nine matches. In January 2022, Galeano joined
Libertad as a manager of the youth sides. On 21 September 2023, he became a first team manager until the end of the year, after
Daniel Garnero took over the
Paraguay national team. Despite winning the
2023 Clausura and the
2024 Apertura, Galeano was sacked on 19 August 2024, after a poor run of form. On 26 October, he moved abroad for the first time in his career, after being named manager of Greek side
PAS Giannina. On 6 February 2025, Galeano was sacked despite being in the third position and having just one defeat. Nineteen days later, he was announced as new manager of Polish side
ŁKS Łódź. Two months later, on 24 April, Galeano was dismissed following a five-game winless streak. ==Managerial statistics==