[2] Born in Naples, Campania, Southern Italy, Improta started his senior career at Serie D club Marcianise.
In the next season Improta was one of the striking partner of Ilyos Zeytulayev and Luís Gabriel Sacilotto in 4–3–3 formation, with 14 starts.
[10][11] On 24 August 2011 Improta left for his third Abruzzo club L'Aquila[12] after the emerge of his brother Riccardo.
Umberto scored 12 goals in 2011–12 Lega Pro Seconda Divisione as team top-scorer.
[15][16] He was dropped from the final squad along with Adriano D'Astolfo, Alex Gibbs, Alessandro Moro and Simone Rota.