Hydroponic Gardener- The Gardener doesn't SOUND like much, but you will be able to reuse items and automatically defeat any alien with Pesticide Spray. Your Briar Grumm isn't going anywhere, but with long range and a tough body, it should seriously restrict Human movements while you use your other aliens to corner them in.

PROS: A strong companion job for one that uses a lot of batteries (like Engineer or Doctor).

CONS: Without your Pesticide Spray, you won't be defeating a lot of aliens. Briar Grumm is strong, but can easily be beaten by a fast human with hit and run tactics.