[3] The most successful periods of Geremi's club career came at Real Madrid and Chelsea, winning the UEFA Champions League with the first and domestic honours with the latter.

In 1996, Geremi received an offer from Cerro Porteño, which he took,[4] after being scouted whilst playing for the Cameroon U21 national team in Brazil.

[7] In 1997, Geremi was teammates with compatriot Cyrille Florent Bella, the Uruguayan Ricardo Bitancort, Brazilian Felippe Ximenes, and Paraguayans Diego Gavilán, Jorge Martín Núñez, Paulo da Silva, Aldo Bobadilla and Roberto Fernández in Cerro Porteño's team.

[9] He only disputed one tournament with Cerro Porteño during six months at the club, [10] reportedly not adapting to Paraguayan football before emprending to travel to Turkey.

[14] In his three years at the Santiago Bernabéu Stadium, Geremi won two Champions League winners medals with the Spanish giants.

He scored two goals whilst at Madrid; his first was a late winner in a 2000 FIFA Club World Championship tie against Raja Casablanca after his side had been reduced to eight men.

In a tribute to Geremi, four years after he left the club, former Real Madrid coach Vicente del Bosque told Spanish newspaper Marca, that Njitap and Steve McManaman were the two most important players in his squad, because "together they kept the whole team united".

[18][19] After an impressive FIFA Confederations Cup campaign with Cameroon, Chelsea paid Real Madrid £6.9 million for him in July 2003,[20] and he went on to have an excellent first season at Stamford Bridge.

In his final year at Chelsea, Geremi scored the winning goal in a home match against West Ham United, a long-range free-kick.

[21] Geremi came on as an extra-time substitute and went on to have his penalty saved by Liverpool goalkeeper Pepe Reina, and Chelsea ultimately lost.

[22] During his time at Chelsea, the club won the Premier League in both 2004–05 and 2005–06, and Geremi was eligible for a winners' medal both seasons as he made 13[23] and 15[24] appearances respectively.

Geremi scored his first goal for Newcastle in a 4–1 victory over Tottenham Hotspur at White Hart Lane on 30 March with a well-taken free-kick[27] and the second a header in the 2–2 draw at Upton Park on 26 April against West Ham.

As a result, Geremi's game time dropped over the course of the season, with the midfielder making 11 league starts without a goal and contributing only three assists.

On 31 January 2010, Geremi's transfer to Ankaragücü of the Süper Lig was announced; he signed a one-and-a-half-year contract with the Turkish club.

In January 2010, Geremi and his teammates traveled to Angola for the 2010 Cup of Nations, falling to eventual champions Egypt in a 3–1 extra time loss.

He played in all three of Cameron's matches as they finished bottom of Group E. Geremi's father, Samuel, is a former footballer who represented Cameroon in the 1970s.