Upon arriving at the club, Le Marchand initially joined as a left-sided midfielder, but eventually moved to the left-back role.

[4] Following the 2008–09 season, Le Marchand signed his first professional contract, agreeing to a three-year deal with Rennes.

[5] Though he was contracted to Rennes, he was not inserted onto their senior team and, instead, sent on loan to Ligue 2 club Le Havre to receive regular playing time.

On 7 August 2009, he made his professional first team debut in the club's 1–1 Ligue 2 away draw with Sedan, playing the entire match.

[7] On 2 November 2017, Le Marchand scored an own goal three minutes into second-half added time in the 2017–18 UEFA Europa League group stage 1–0 loss to Lazio, causing Nice to slump to their sixth straight defeat in all competitions.