Job titles may be capitalized when used as part of a name or to directly address someone, but should be lowercased when used descriptively or as common nouns. He was hired by Director Brown . Yes, Chef !
Should job titles be capitalized?
Titles should be capitalized, but references to the job are not. For instance, if you are using a job title as a direct address, it should be capitalized. ... Title references that immediately precede the person's name should also be capitalized.
What words should you capitalize?
In general, you should capitalize the first word, all nouns, all verbs (even short ones, like is), all adjectives, and all proper nouns. That means you should lowercase articles, conjunctions, and prepositions—however, some style guides say to capitalize conjunctions and prepositions that are longer than five letters.