Complex sentence: They are considered so untrustowrthy and underhand by the other Orcs and goblin races that they refuse to have dealings with them, however they are employed by the Chaos Dwarfs as their slave drivers organising other goblin slaves.
Split into simpler sentences: They are considered so untrustworthy and underhanded by the other Orcs and goblin races that they refuse to have dealings with them. However, they are employed by the Chaos Dwarfs as their slave drivers organizing other goblin slaves.