pen pusher
From Longman Dictionary of Contemporary EnglishRelated topics: Occupations, Officespen pusherˈpen ˌpusher noun [countable] British English informalBOBBO someone who has a boring unimportant job in an officeFrom Longman Business Dictionarypen pusherˈpen ˌpusher noun [countable] British English someone who has a boring and unimportant job in an officeSYNpencil pusher AmE