After graduating, how does a Swiss student permit become a work permit?

There is no automatic switch from a student permit to a work permit. After graduation, a third-country national who finds a job must qualify under the rules for skilled non-EU/EFTA workers: the role should suit a manager, specialist or skilled professional; the employer must show that priority was given to Swiss and EU/EFTA candidates; and qualifications, salary and working conditions must meet customary standards. The six-month job-search window after graduation is meant to give you time to secure such an offer.