In August 2021, Bourj signed Sadek from Tripoli ahead of the 2021–22 Lebanese Premier League season.[2] He played in their youth setup, helping them win the youth league title,[3] and scored two goals in eight Lebanese Premier League games in his first season.[1] Sadek became a starter for Bourj during the 2022–23 season, scoring five goals in 20 league games.[1]
In April 2023, Sadek joined Nejmeh for the 2023–24 season.[4] He scored on his club debut on 5 August, in the opening match of the league season against Tripoli.[5]
On 27 March 2023, Sadek made his international senior debut in a 2–0 friendly defeat to Oman.[1] Sadek scored his first senior international goal on 25 June 2023, in a 4–1 win against Bhutan in the 2023 SAFF Championship.[7]