The 21-year-old Italian rookie joins the WorldSSP paddock for what will be his first full season in the WorldSSP field. The Roman rider made his debut in the category last season at Aragon where he competed in the last three rounds of the season. Prior to 2025, Giombini is a four-year veteran of the Italian Supersport championship. His best season was in 2024, where the Italian caught the attention many with his breakout seventh-place campaign in which he took home a trio of podiums after having finished in 19th in back-to-back seasons with out any podium glory to his name. Giombini will look for similar breakout success to make a name for himself in WorldSSP.