If it is Ordo then im gonna guess it was after Kotor1 because in kotor2 he is Mandalor the Preserver.
and a except from Wookieepedia
"As Ordo journeyed to reunite the Mandalorian clans, he met an ailing Taung who declared himself to be the true Mandalore, and claimed that the man known as "Mandalore the Ultimate" was a pretender to the Mandalore title. Before dying, this nameless Mandalorian consigned his armor and clan to Ordo, asking him to preserve their traditions. Ordo took the armor for himself, and incorporated the mask given to him by Revan. Taking the title of Mandalore the Preserver, Ordo returned to the Mandalorian outpost of Dxun, one of the four moons of Onderon."