After retiring as a player, Longo took on a coaching career, first as a technical collaborator to
Cristiano Bergodi at
Modena and
Brescia and then as a youth coach at
Bari. In 2019, Longo joined
Padova's coaching staff. On 21 February 2022, following the dismissal of head coach
Massimo Pavanel, he was appointed
caretaker in charge of the first team. After having been in charge for a 1–1 home draw against
Legnago, he left his caretaker role on 24 February following the announcement of
Massimo Oddo as the new manager. In October 2023, he sustained injuries from projectiles thrown at the team bus by opposing fans while serving as assistant to
Lyon manager
Fabio Grosso. ==References==