Born in Naples, Campilongo started his career with Juve Stabia, then joining Lazio in 1980 and making his Serie A debut on 4 May 1980 with the biancazzurri jersey.
In 2007, he left Cavese to join Serie C1 promotion hopefuls Foggia, only to be fired a few months later by the satanelli management.
In July 2009 Campilongo was appointed at the helm of ambitious Tuscan outfit Empoli, a team he was part of as a player from 1981 to 1983, with the aim to guide his new club back into the top flight.
On 2 July 2014, he signed to Rimini in Serie D but about two months later, before the season, he rescinded the contract by mutual consent.
[6] He was sacked on 4 April 2021 after failing to overturn the club's fortunes, leaving Cavese at the bottom of the Serie C league table.