There are several types of careers that can be pursued with a focus in nutrition. Specifically a nutritionist, cook, or dietitian.
In an ideal situation, I would specifically want to become a nutritionist for a campus dining hall. I would be in charge of coordinating meals and creating a variation of diets for students on campus.
In order to become a nutritionist at a dining hall I would need to major in dietitian and nutrition. The reason I would want to pursue this career would be to have an impact on the health of college students.
Becoming a nutritionist would be a dream of mine, especially because I am passionate about food and health. I believe that every campus should have a nutritionist.
At the bottom of this link there is an example of a nutritionist at a university.
Cristina's College Food 