As an undergrad at the University of California, Santa Barbara, I studied organizational communication while taking multiple courses in business writing and geology
This is a weak first sentence, because you are starting right away with listing things you hae done and learned. start by expressing a theme, a thoughtful concept or observation that will be like the heart of the essay. The heart of the essay is in the intro.
An employer with widespread U.S. and international presence, such as the Environmental Protection Agency, or a state department of water resources would be ideal.
It is good that you are specific about your ideas for the future, but... actually this is not that specific. Can't you attach this to some larger plan based on your outlook on life, your passion and idealism about protecting the planet?