Benussi started his career at Venezia, After he made his team debut in 1999–2000 season. He was loaned to Serie C1 clubs likes Lumezzane and Ascoli. After played as a backup of Giovanni Indiveri, he returned to Venice and played as a backup of Salvatore Soviero before left on loan again for Arezzo of Serie C1. Benussi became first choice after Soviero departed for Reggina.
Lecce
After Venezia bankruptcy and relegated, Benussi was signed by Lecce, as first a backup to Vincenzo Sicignano in August 2005. But due to injury of Sicignano, he played 15 Serie A games. Lecce failed to protect her place in Serie A, and saw Sicignano left the club. Benussi became the first choice at the start of 2004–05 season, before left on loan to A.C. Siena as player exchange with Nicola Pavarini. At Siena, he failed to challenge Alex Manninger for the first choice, and Siena has not decided to bought Benussi outright. Returned to Lecce for another Serie B season, his first choice place was challenged by Antonio Rosati but Benussi played 23 Serie B games and all 4 promotion playoffs, to win promotion for the Apulia club in June 2008.
On 12 August 2009 Livorno have signed the goalkeeper on loan from U.S. Lecce. He played as an unused substitute on 9 August, in the Coppa Italia match that Lecce won 4–0 over Vico Equense. On 25 October 2009, he played his first match for Livorno, substituted Nico Pulzetti after goalkeeper Alfonso De Lucia was sent off. He played as starter in the subsequent 3 league matches and 2 Coppa Italia games.
On 1 February 2010 Benussi agreed for a loan transfer to Palermo, with Rubinho making the opposite move, reunited with former Venezia owner Maurizio Zamparini. After Palermo signed Giacomo Brichetto permanently, Benussi also signed permanently from Lecce a week later, on 22 July 2010. He signed a 3-year contract. Constantly a second choice behind Italian international Salvatore Sirigu, Benussi has since played only at UEFA Europa League level during his period while at Palermo. Initially confirmed as second goalkeeper following the departure of Sirigu to Paris Saint-Germain F.C. and the signing of Greek international Alexandros Tzorvas as a replacement, he successively became the first choice under new head coachesDevis Mangia and Bortolo Mutti. Following the acquisition of Italy international Emiliano Viviano, Palermo opted to send Benussi on loan to Torino in the Serie B league.
Benussi has been capped for the Italy U20 side in 2000 at the Toulon Tournament, behind Generoso Rossi as 2nd choice goalkeeper. He played once at the tournament.
