When preparing for an interview for an environmental engineer job, it's important that you have done your research. If you're familiar with the type of work that the company does, you'll be more able to pull from your experiences the most relevant examples of how you can benefit their company. An environmental engineer career affords a variety of opportunities, and you must be able to accurately describe your environmental engineering career information and experience.
Demonstrate your knowledge in your resume, portfolio, and in the examples you provide during the interview. Remember to dress professionally, even if the company boasts a casual atmosphere.