In early 2003, Sibi was set to make his acting debut through Swami, the Tamil remake of the Malayalam film Nandanam (2003), directed by Renjith.
[3] In his next four films, Jore (2004), Mannin Maindhan (2005), Vetrivel Sakthivel (2005) and Kovai Brothers (2006), he acted with his father, Sathyaraj, who also produced Sibi's following project, Lee (2007), directed by Prabhu Solomon, where he played the role of a football player.
[4] In his early years, several films he was announced to be part of, such as Perumal Swamy,[3] Pattasu and Mamu, were shelved midway.
[7] Following Naanayam he went on another sabbatical, during which he pursued an acting workshop at the New York Film Academy (NYFA) in Los Angeles for three months,[8] before returning in 2014 with Naaigal Jaakirathai, again directed by Shakti Soundar Rajan.
[9] The film, which Sibi reportedly accepted after having listening to more than 200 scripts,[10] featured him alongside a Belgian Shepherd dog as the protagonist.