The company has no environmental 'expertise'. [=the company does not have experience with environmental problems, matters, etc.]
This question falls outside my 'area of expertise'. [=the subject area I know a lot about]
His 'expertise' on defense will help the team.
(..) at this very moment... ...he is handing over to her all of my pertinent tax information... ...and she has assured us... ...that the matter is well within her field of expertise. Why is she doing this? I don't know. It must be love. I don't think we should see each other anymore. You're great... (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2