Thomas Gaëtan Bong (born 25 April 1988) is a Cameroonian former professional footballer who played as a left back.

[4] He began his career in Metz's youth ranks at age fourteen, having started out at La Madine Training Centre in his native Cameroon.

[27] He made his FC Tours debut against Dijon FCO on 22 August 2008, coming on as a substitute in just 18 minutes from the game, in a 2–1 loss.

[29][5] Bong made his Valenciennes debut, coming on as a late substitute, in a 3–1 loss against AS Nancy in the opening game of the season.

[31] Bong played against his former club, FC Metz, for the first time in the round of 16 of Coupe de la Ligue, as they lost 2–0 on 22 September 2009.

[37] Shortly after, Bong served a two match suspension by the Disciplinary Commission of the LFP, due to the incident he was involved during a 3–2 win over Marseille on 14 August 2010.

[42] However, during a 2–2 draw against SM Caen on 19 February 2011, Bong suffered a muscular injury to the adductors that saw him sidelined for several weeks.

Ahead of the 2011–12 season, Bong was linked with a move to Ligue 1 side Stade Rennais but stayed at the club in the end.

[72] From 1 December 2013 to 26 January 2014, Bong helped the side keep eight consecutive clean sheets, which he played six matches.

[75] However, in the 2014–15 season, Bong found his first team opportunities at Olympiacos limited, due to fallen out of favour under the new management of Michel and was expected to leave over the summer, which never happened.

[82] It was announced on 2 July 2015 that Bong joined EFL Championship side Brighton & Hove Albion on a free transfer, signing an initial two-year contract with the south coast club.

[83] Upon signing for the club, he revealed that he rejected a "lucrative offers from at France and abroad" to join Brighton & Hove Albion.

[87] In a match against Ipswich Town on 29 August 2015, Bong set up the first goal of the game for Kazenga LuaLua, in a 3–2 win.

[105] However, his first team opportunities at the club was limited, due to Markus Suttner being preferred at the first choice left–back position, as well as, his own injury concern.

[110] Bong accused Jay Rodriguez of making a racist remark during a 2–0 defeat at West Bromwich Albion on 13 January 2018.

[116] After the match, Manager Chris Hughton, the FA and anti-racist organisation Kick It Out condemned the actions from Burnley's supporters.

[117] On 4 May 2018, Bong played in the 1–0 home win over Manchester United which secured The Albion's Premier League survival with two games remaining, as well as, keeping another clean sheet.

[120] Despite this, Bong played the whole match where Brighton & Hove Albion beat Manchester United at home for the second season running on 19 August 2018.

[122] Bong helped the side keep three clean sheets throughout October, as Brighton & Hove Albion won all three league matches.

[130] As a result of facing competition for a place in the side from teammate from Bernando throughout the 2018–19 season, they both started 19 league games and coming on as subs on 3 occasions.

[133] Bong's first appearance under their new manager, Graham Potter came on 27 August 2019 where Brighton beat Bristol Rovers 2–1 away from home in the EFL Cup.

Subsequently, Bong did not feature in any of Sabri Lamouchi's match day squads for the rest of his tenure as Forest manager.

[145][146] After Lamouchi's sacking, Bong was brought back into Forest's first team plans by new manager Chris Hughton, who had previously won promotion alongside him with Brighton & Hove Albion.

[142][148] However, Bong's return was short–lived when he found himself placed on the substitute bench, due to the competition in the club's defence, as well as his own injury concern.

[150] Bong made his second start under Hughton on 23 January in a FA Cup fourth round tie at Swansea City in which Forest lost 5–1.

[153] Although Bong was not in Hughton's plans, he started in Forest's opening game of the 2021–22 season away at Coventry City on 8 August where they fell to a 2–1 defeat as the home team returned to their stadium after 833 days.

[157] On 29 May, Forest beat Huddersfield in the Championship play-off final to earn promotion to the Premier League, however Bong was not involved.

He made only seven appearances all season, his last coming on 6 January and on 10 June it was announced that Bong would leave the side on the expiry of his contract.

[161] Bong was named in Paul Le Guen's final 23-man roster for the 2010 World Cup in South Africa.

[169] The defending champions, Cameroon beat Guinea-Bissau 2–0 in their opening group game with Bong an unused substitute.