Chat command
/skill
Console command
set.lvl steamid lvl skill
skill: 0 - miner, 1 - alchemist, 2 - woodcutter, 3 - hunter, 4 - marauder, 5 - technicist, 6 - jeweler, 7 - dustman
Ex. set.lvl 76561198125444659 10 5 - ADD 10 levels for player skill (technicist)