Rafael Silva Guanaes (born 27 March 1981) is a Brazilian football coach and former player who played as a midfielder. He is the current head coach of Operário Ferroviário.

Born in São Paulo, Guanaes played for Palmeiras, Corinthians and Nacional-SP as a youth.^[1] He also played for the Campbell University's soccer team during the 1999 and 2000 campaigns,^[2] Nacional and Joseense.

On 16 June 2010, Guanaes was named manager of Joseense for the remainder of the year, replacing sacked Ricardo Longhi.^[3] He achieved promotion to Campeonato Paulista Série A3 with the club in 2012, and was appointed in charge of União São João on 6 August 2014.^[4]

Guanaes was sacked by União on 9 September 2014,^[5] but took over São Carlos on 2 December, for the ensuing campaign.^[6] He won the Campeonato Paulista Segunda Divisão in the following year with the club, but left in November 2016 as his contract expired.^[7]

On 18 November 2016, Guanaes was appointed Monte Azul manager.^[8] He took over Votuporanguense on 29 September of the following year,^[9] and won the 2018 Copa Paulista with the latter club.

On 2 January 2019, Guanaes was named manager of Athletico Paranaense's under-23 side.^[10] He won the 2019 Campeonato Paranaense with the club, and later went on to work also with the under-20s.^[11]

On 5 February 2021, Guanaes left Athletico to take over Série B side Sampaio Corrêa.^[12] Dismissed on 22 April,^[13] he replaced Bruno Pivetti at the helm of Tombense four days later.^[14]

Guanaes led Tombense to their first-ever promotion to the Série B, but was sacked on 22 February 2022, with the club threatened with relegation in the 2022 Campeonato Mineiro.^[15] He then worked for a short period as a permanent assistant manager at Cruzeiro before taking over second division side Novorizontino on 21 June.^[16]

On 3 September 2022, Guanaes was sacked by Novorizontino.^[17] On 1 November, he was announced as manager of Operário Ferroviário, recently relegated to the third level, for the upcoming season.^[18]