The NOC is mainly decided by the job duties and responsibilities regardless of the job title, your title could be a chef but as long as you do what a sales manager does in terms of job roles then you can pick the NOC for that.
You job duties has to substantially match those in the NOC (people say 60 to 70 percent).
Search for keywords about duties you perform instead of titles as the roles and responsibilities are what matters the most. Try looking into NOC 0611
Good luck