Father Melchior Poisson, LC, was born on April 6, 1989, in France. He entered the Legion of Christ in 2007 and was ordained a priest on May 7, 2022.

He worked in Rome in the Regnum Christi Area of Life and Mission area and in the Legionary General Directorate from 2018 to 2021. He also worked with the youth section in West Mexico City and with the Network of RC Mission Corps Missionaries. He is currently the director of the Regnum Christi youth section in Querétaro.