Guilherme António de Souza, known as Alemão (born 7 December 1992) is a Brazilian professional footballer who plays as a defender for Armenian Premier League club Pyunik.

[2] Alemão made his professional debut in the Segunda Liga for Marítimo B on 31 August 2013 in a game against Feirense.

[3] Alemão made his Primeira Liga debut for Marítimo on 4 May 2014 as a late substitute in a 1–1 draw against Braga.

[11] On 1 June 2024, Ararat-Armenia announced that Alemão had left the club after his contract had expired.

[12] On 7 July 2024, Armenian Premier League club Pyunik announced the singing of Alemão.