The player collects him from a random alleyway location, where he will be smoking and talking to friends including The Lost Girl on Manchez motorbikes.
The Diamond Casino Heist
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Yohan surname is revealed when he is made available hacker for The Diamond Casino Heist with a 5% cut. He is only available if the player owns a nightclub. He, along with Christian Feltz, are classified as 'good'.
If Yohan is chosen, he will grant the player 2m 52s in the vault. If the team is however detected or doing the aggressive approach, he will give 2m 1s.
Yohan, with The Lost Girl and two other associates, before starting to work for the player.