Ghost busting for a living.
Seems like a scary job, but basically you're just telling someone that they can cut out of work early.
Because spirits are always only hanging around to complete some "unfinished business."
And all they have to be told is that their work is done.
No more chain-clanking, no more terror-inducing, no more blood-splattering necessary.*
Time to punch out. Forever.
* That last one especially true for the ghost of Jackson Pollack.