Born March 26, 1985 in Grande-Rivire-du-Nord, Haiti. He is the oldest of three siblings, and the only boy. 
There was something there from childhood, Fr. Saint-Jean said of his uncles influence in his life. I had the call to become a priest since I was eight years old.
He remembers why. He heard a priest in his parish preaching that the harvest is plenty but the laborers are few, and encouraging young people to follow in his footsteps. For some reason, it stayed with me.

He did consider studying medicine when he was in high school. But then he moved to a different city in Haiti and again heard another priest preach about vocations.

That's when it took hold of him: the urge to serve, to be Christ for the others, especially the ones that are left out, the poor, the homeless.

Deacon Saint-Jean entered St. John Vianney Seminary in 2005 and spent four years there, getting a degree in philosophy, before completing five years at St. Vincent de Paul Seminary. In addition to English, he speaks Spanish, French and Creole.
He spent his pastoral year at St. Elizabeth of Hungary in Pompano Beach and his deaconate year at St. Elizabeth Ann Seton in Coral Springs.