landman

/L AE1 N D M AH0 N/
noun
  1. 1

    Someone who lives or works on land, as opposed to a seaman.

  2. 2

    In the United States, a person involved in determining, transferring, or managing mineral rights, to include oil (petroleum) and natural gas exploration, development, and production.

Source: https://en.wiktionary.org/wiki/landman