Ahead of the 2009–10 season, Culio continued to be linked a move away from the club, as interests from European clubs increased, including Porto, which saw Álvaro Pereira joined the side. Eventually, he stayed at the club throughout the summer transfer window. In the Supercupa României against Unirea Urziceni, which the game was played for 120 minutes following a 1–1 draw, Culio started the season well when he helped the side win 3–2 in the penalty–shootout despite missing a penalty. After missing two matches, he returned to the first team and played in both legs against FK Sarajevo in the UEFA Europa League Play–Offs, which they won 3–1 on aggregate. Following his return, Culio regained his first team place for the side. He then scored his first goal of the season on 16 September 2009, in a 2–0 win over Copenhagen in the UEFA Europa League Group Stage. Following a 3–2 loss against Sparta Prague in the UEFA Europa League Group Stage on 5 November 2009, Culio was involved in alteration with the club's supporters, which he apologized after the match. It wasn't until on 13 March 2010 when he scored his first league goal of the season, in a 2–2 draw against Dinamo București. Later in the 2009–10 season, Culio helped the side win both the league and the Cupa României after beating FC Vaslui 5–4 in penalty–shootout in the final. Despite being out on two occasions during the 2009–10 season, Culio went on to make forty–two appearances and scoring two times in all competitions.