locksmith, 1451.Locksmithing is the science and art of making and defeating locks. Locksmithing is a Locksmith" redirects here. For other uses, see Locksmith (disambiguation).An illustration of a German traditional trade and in many countries requires completion of an apprenticeship. The level of formal education legally required varies from country to country from none at all, to a simple training certificate awarded by an employer, to a full diploma from an engineering college, in addition to time spent working as an apprentice.