Day Shift
directed by J.J. Perry
There are more than a few books that feature mercenary minded heroes who make their living by hunting, trapping, and killing supernatural creatures. The authors A. Lee Martinez, Mike Carey, and Larry Correia are the first people to come to mind but if I gave it some thought I know could think of many more.
There have also been movies with such themes. Some have worked. Some have not. I think It's difficult to mix horror, action, comedy and a world weary cynical point of view in which destroying the supernatural is just another day at the office. Shaun of the Dead and The Dead Don't Die were two such films that blended humor and real fear successfully.
I think such stories tend to work better as novels than as movies. Day Shift's problem was that it underplayed the horror in favor of the humor even though the humor was at best hit or miss. Mostly miss actually.