Speaking as the co-author of the Haskell book mentioned in the post and somebody that has used Haskell 9-5 for a couple years - you'll have more luck getting permission to trial Haskell internally than you will competing with other Haskellers for the jobs that are out there.

I recommend getting comfortable with the sorts of libraries you'd use at work before trialing to avoid what fizbin mentioned elsewhere in the thread.

tl;dr create, don't take, a Haskell job