[1][2] Mansaly made his debut for the first team in a Ligue 1 match on 15 August 2009 when coach Alain Perrin used him all the minutes in a 3–1 away loss in front of Toulouse.
[1][2] In the summer of 2012, Mansaly went to play in Romania for Dinamo București where he was wanted by coach Dario Bonetti, the team needing a replacement for Djakaridja Koné.
[1][2][5] In his first game he was used the whole match by Bonetti, playing in the central midfield along compatriot Issa Ba in the victory from the penalty shoot-out against CFR Cluj from the 2012 Supercupa României, having an appreciated evolution.
[1][9] In September 2015, Mansaly signed a two-seasons contract with Astra Giurgiu, in the first one he played 13 league games under the guidance of coach Marius Șumudică as the team won the title.
[1][13] In 2017, Mansaly left Romania to go play for Turkish second league BB Erzurumspor, then moving in Lebanon at Salam Zgharta, afterwards going in Kazakhstan at Atyrau with whom he reached the 2019 Kazakhstan Cup final, where coach Kuanysh Karakulov sent him on the field in the 74th minute in order to replace Mikhail Gabyshev but got replaced in the 113th minute with Ivan Antipov in the 2–1 loss in extra time in front of Kaysar Kyzylorda.