beancounter

/B IY1 N K AW1 N T ER0/
noun
  1. 1

    (mildly) A person, such as an accountant or financial officer, who is concerned with quantification, especially to the exclusion of other matters.

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Source: https://en.wiktionary.org/wiki/bean%20counter, https://en.wiktionary.org/wiki/beancounter