scrutineer

noun

1. A person who scrutinises; a person responsible for scrutineering.

   “Those people coined the term “open source,” to stress the instrumental benefits of allowing others to scrutinize code: these scrutineers could root out defects and prevent the nefarious subversion of code to spy on or steal data from its users (there’s a saying for this, too: “with enough eyeballs, all bugs are shallow”).”

2. (Canada)A poll-watcher.
3. (Canada)A person who observes any process which requires rigorous oversight.

verb

1. (transitive)To scrutinise; to thoroughly check that an election is being run fairly, or that a vehicle meets the rules of a competition, etc.