NOC has different skill levels that are based on the type of occupation. These skill levels are:
- Skill Level O: Management related professions;
- Skill Level A: Occupations that require at least a university degree;
- Skill Level B: Tech-related occupations that require an apprentice training or college diploma;
- Skill Level C: Intermediate professions with a high school diploma;
- Skill Level D: Labour related profession that requires only training;