Early years and Nancy A
central defender, Jeanvier began his career in 2000 with hometown club US Clichy-sur-Seine. He moved to
L'Entente SSG in 2006 and trained concurrently at
Clairefontaine, before joining the
academy at
Nancy in 2008. The appointment of former head of youth
Patrick Gabriel as first team manager midway through the
2012–13 Ligue 1 season saw Jeanvier promoted into the first team squad and he made 10 appearances between January and April 2013. He refused the offer of a new two-year contract extension and departed the
Stade Marcel Picot at the end of the 2012–13 season. He instead played for the reserve team and spent the
2014–15 and
2015–16 seasons on
loan at
Mouscron-Péruwelz and
Red Star respectively. He failed to make a first team appearance and left the club in August 2016.
Reims In August 2016, Jeanvier dropped into
Ligue 2 to join
Reims. Jeanvier had a successful 2017–18 season, vice-
captaining the team and helping the club to the Ligue 2 championship and promotion to Ligue 1. He departed the
Stade Auguste-Delaune in July 2018, speculated to be £1.8 million. He scored a goal in each of his first two appearances for the club, which came in the early rounds of the
EFL Cup, The unavailability of
Chris Mepham and new head coach
Thomas Frank's deployment of three centre backs saw Jeanvier win a starting place on his return to fitness in December 2018 and he remained a near-ever present starter until the end of the
2018–19 season.
2019–2021 and loan to Kasımpaşa Despite being behind
Pontus Jansson and
Ethan Pinnock in the pecking order when either was available, Jeanvier made 27 appearances and scored one goal during the
2019–20 season, After the signing of
Charlie Goode during the 2020 off-season saw Jeanvier demoted further down the pecking order, he joined
Turkish Süper Lig club
Kasımpaşa on loan for the duration of the
2020–21 season. In late October 2020, after making four appearances, In his absence,
2021–22 season Jeanvier was included in Brentford's 25-man Premier League squad for the
2021–22 season and by mid-November 2021, he had returned to non-contact training. He made his return to non-competitive match play with
Brentford B in late March 2022. On 10 April 2022, illness suffered by Pontus Jansson saw Jeanvier named in a matchday squad for the first time since the
2020 Championship play-off final and he remained an unused substitute during a 2–0 Premier League victory over
West Ham United. He was an unused substitute during a five further matches before the end of the Premier League season and was released when his contract expired. During four seasons with Brentford, Jeanvier made 58 appearances and scored six goals.
Auxerre In July 2022, Jeanvier joined Championship club
Reading on trial and took part in the club's
St George's Park training camp, but was not offered a contract. On 18 July 2022, he joined newly-promoted Ligue 1 club
Auxerre on a two-week trial and signed a one-year contract, with a one-year option, on 2 August 2022. Jeanvier made 24 appearances and scored one goal during a
2022–23 season in which the club suffered relegation back to Ligue 2. He was released when the club declined to take up the option on his contract.
Kayserispor On 16 September 2023, Jeanvier returned to Turkey to sign a two-year contract with Süper Lig club
Kayserispor on a
free transfer. He made 14 appearances and scored one goal during a
2023–24 season in which the club narrowly avoided relegation. Either side of three months out with a
medial collateral ligament problem in his left knee, Jeanvier made 14 appearances during the
2024–25 season and was released when his contract expired. As a result of a delayed payment of €135,000 to Jeanvier, the club was subsequently banned from participating in three
transfer windows.
Gulf United In late September 2025, Jeanvier signed a contract with
UAE First Division League club
Gulf United on a free transfer. ==International career==