Nearly any job can become a green job with the right mind set and the ability to solicit change. Look for ways to save energy, reduce waste, recycle and use resources wisely. These are all ways to green any job. If you are inclined to search for a job that by its very nature is green however, consider using some of these web sites for your search.
To learn more about graduate programs (specifically Masters of Business Administration) that are in environmental science and sustainability, check out this site:
Have you ever wondered what you can do with your environmental studies degree? Check out this chart originally prepared by the University of Tennesee for ideas. It is arranged by degree areas, possible areas of employment, and strategies.