The Dark Arts goblins dabble in all sorts of seedy and exceptionally dangerous projects - all having to do with tapping the demon world and using volatile enchantments and potions. It goes without saying that they don't know what they're getting themselves into.
The Dracogoblins are the goblins that deal exclusively in dragons. From catching to wrangling to taming (doesn't really work out too well) and also egg harvesting, these goblins work an extremely high-risk job. I like the goblin that has a pathetic little net to cast on a dragon - he cowers behind his ceramic heat-shield knowing his job sucks.
Lastly is the guy with what HE thinks is the suckiest job but is really one of the safest (with a mortality rate of merely 57%). He's the fertilizer goblin - and his job is to scoop dragon shit all day long and take it to the agriculture goblins so they can use it to fertilize their warped, monsanto-like crops.
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