According to English voice actor Sean Chiplock during a 2020 Reddit AMA, he was asked how did he get to voice Noob Saibot. He responded:

"Pretty much the same as I potentially get any other role; my agency sent me audition sides for the character, I submitted my audition takes, and the client decided they liked one of them enough to cast me! The character/project was codenamed at the time so I didn't know what it was for, but the specs asked for something "wraith-life and not of this world". So for the first take, I did something higher pitched and ghostly, with a little bit of teeth; for the second, I impersonated Black Doom from Shadow the Hedgehog's game on GameCube, and aimed for a baritone demonic rumble."