His father died when he was young and his mother sent him to school at the collegiate church of St Germain in Mons (abolished in 1799).
Appointed to a canonry of Cambrai Cathedral, he obtained a leave of absence for two years to travel in Italy, spending time in Rome and Bologna, where he was ordained priest and graduated doctor of both laws.
[1] In 1586 Bishop Berlaymont chaired a provincial synod in Mons that commissioned Buisseret to compile an updated overview of the canon laws applicable in the archdiocese.
[3] In 1602 Buisseret was appointed bishop of Namur, receiving episcopal consecration in Saint Waltrude Collegiate Church in Mons.
[1] As bishop of Namur, Buisseret founded a Sunday school, admitted a Jesuit college, and established convents.