Career
He is currently Unattached. Lanseur began his career at age 9 with his hometown club of AS Saint-Étienne. He worked his way up the ranks of the club and became the captain of the reserve team in the 2009-2010 season.
In the summer of 2010, when he was not offered a professional contract by the club, he left to join Football Club Libourne-Saint-Seurin.
In January 2011, Lanseur was linked with a move to Exact Sciences Sétif. However, a month later, he ended up signing with another Algerian club, USM Blida.
On August 9, 2009, Lanseur was called up by head coach Abdelhak Benchikha to the Algerian Under-23 National Team for a week long training camp in Blida. He was called up again later that month for another training camp.