fixer
noun
Definitions
Agent noun of fix; one who, or that which, fixes.
A chemical (sodium thiosulfate) used in photographic development that fixes the image in place, preventing further chemical reactions.
(criminal justice) A person who arranges immunity for defendants by tampering with the justice system via bribery or extortion, especially as a business endeavor for profit.
A person who assists foreign journalists in volatile countries, often providing interpretation, personal connections, and transportation services.