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On 5 September 2017, Choco signed with A Lyga club Sūduva Marijampolė.

On 19 December 2016, Choco signed with Bulgarian First League club Lokomotiv Plovdiv. In May 2017, his contract was terminated by mutual consent.

On 27 May 2015, Choco signed a two-year contract, with the option of a further season with APOEL from Cyprus. His contract with APOEL was terminated in December 2015, leaving the team after only seven months and without managing to appear in any official match.

On 23 December 2015, he moved back to his country and signed a contract with the Campeonato Brasileiro Série B club Sampaio Corrêa.

Choco went through the youth academy of Santos Futebol Clube. On 7 January 2011, he moved from Santos to Bulgarian side Ludogorets Razgrad, signing a three and a half-year contract and becoming the team's first foreign signing of the Domuschiev era.

Choco scored his first goal for Ludogorets on 15 October 2011, netting the second goal in a 4–1 home win over Minyor Pernik. He was primarily a starter during the 2011–12 season, being a key part of Petev's team that won its first top division title, but made only very sporadic appearances over the course of the 2012–13 championship. He continued to feature only on rare occasions during the 2013–14 (though he did play a part in the 2013–14 UEFA Europa League group stage, appearing in three of their victories) and 2014–15 campaigns (not being registered for the 2014–15 UEFA Champions League group stage). Choco left the team by mutual consent at the end of November 2014. He stated that Ludogorets will always remain in his heart.

On 26 October 2011, Choco received Bulgarian passport and become able to play for Bulgaria.

Guilherme de Souza (born 18 January 1990), commonly known as Choco, is a Brazilian footballer who plays for Bulgarian club Lokomotiv Sofia. He normally plays in a right back position, but can also play on the right side of midfield.