Someone who sets the betting odds based on calculations of the outcome of a contest (especially a horse race)(noun)
WordNet. Princeton University. 2010.
Use "odds-maker" in a sentence
"Awards | David Welsh plays odds-maker with the Eisner Awards 'manga category."
"In the spirit of our first known cosmic odds-maker, Blais Pascal, let's wager that Baldauf's bet is worth examining -- not for his sake but for ours."
"I'm not sure how much of an odds-maker Mr. ExpertGuy near the pet store is, but in my life, not many 40-to-1 odds in my favor present themselves."