Thomás' youth football career started with the Brazil club CFZ, then he went to the other hometown club :pt:Sport Club Juiz de Fora|Sport. He holds dual-citizenship and an Italian passport beside his Brazilian nationality. In 2006 Thomás arrived Italy to go through a trial period at Italian club Roma. After that he entered the youth team of Botafogo.
Flamengo
Thomás went into Flamengo's youth in 2008. In 2010, he became the champion of Campeonato Carioca de Juvenis with the team in an undefeated season and was the team's top scorer in the competition. In 2011, selected by head coachVanderlei Luxemburgo, Thomás entered Flamengo's senior squad, as well as earned his no. 25 jersey. He made his professional debut for Flamengo on 23 July 2011 against Ceará Sporting Club in Campeonato Brasileiro, and earned 9 appearances for Flamengo in Campeonato Brasileiro. In 2012, he changed his uniform to no. 20 and made 10 appearances in 2012 Campeonato Brasileiro season. On 16 March 2012, Thomás earned his first Copa Libertadores debut against Paraguayan club Olimpia Asunción at group stage, started the game and played 78 minutes. He played for Flamengo in 28 professional matches including 19 Campeonato Brasileiro appearances and nine more Campeonato Carioca games.
On 7 August 2013, Italian football club Siena announced that they made an agreement with Flamengo to loan Thomás for one year. He made 12 appearances for Siena in Serie B, as no. 10 of Siena. Then he came back to Brazil and re-registered into Flamengo's squad on 16 June 2014 but failed to get more opportunities under Vanderlei Luxemburgo.
On 19 August 2014, Globo reported that Campeonato Brasileiro Série B club Ponte Preta signed Thomás on loan from Flamengo until the end of season. Thomás made a total 21 appearance for Ponte Preta, including 13 Série B matches in which he scored his only goal against Atlético Goianiense and 8 Campeonato Paulista matches. On 12 May 2015 he ended his loan and was back to Flamengo again.
On 1 June 2015, the Major League Soccer club Seattle Sounders FC announced on their website that Thomás had finished his permanent transfer from Flamengo to the Sounders. Thomás made his debut for the Sounders on 7 June 2015, replacing Marco Pappa as a substitute on 80th minute during the road game against Sporting Kansas City which Sounders lost 0-1. On 15 August 2015 Thomás scored his first goal for the Sounders in their 4-0 win against Orlando City SC.
On 22 June 2018, Thomás signed a three-year deal with Super League club Apollon Smyrnis. On 16 December 2018, Thomas Jaguaribe scored the only goal of the game in the 59th minute to clinch a long-awaited three-point haul for Babis Tennes’ team in a win game against Xanthi, who have now given their fans some hope in what has been a woeful campaign so far. It was the first win for the club in 2018–19 season in an ill-tempered Matchday 14 clash.
