There are several ways to boost your rank, ranging from dedicated mod files to manual save editing:
Console players cannot use Cheat Engine or edit save files manually. You are restricted to mods approved by the developers via the in-game mod browser. snowrunner xp mod
PC players have the easiest time modifying the game. There are several ways to boost your rank,
If you don't want to run external software, you can manually edit your save file. this is the #1 problem.
As mentioned in the warning, this is the #1 problem.