I think you may be surprised what kind of companies embrace being “green.” You may have to travel to mid to larger sized companies to get past “we changed our light bulbs to save energy” but I will say I work for a mid sized Design & Engineering company where we also do alot of manufacturing, and when I started I was really surprised how many green initiatives we have and have succeeded in including on the path to near zero waste and we implement green processes when we can with manufacturing and engineering/design choices. My advice is to start interviewing at places you would be interested in, and during your interview when they usually ask if you have any questions start to ask them if they’re doing anything around a green perspective and what the possibilities of participating in those initiates would be.