The Department of Chemical and Biological Engineering's mission is to educate the leaders in chemical and biological engineering by conducting research that defines the frontiers of knowledge in our field. We prepare chemical and biological engineers for careers in teaching, research and development, entrepreneurship, and management in academia, government, and industry. Building on world-class research and scholarship, Princeton's Department of Chemical and Biological Engineering has particular strengths, including our small student-to-faculty ratio, ensuring true mentorship during graduate study, a diverse graduate student body producing outstanding scholarship, uniformly strong academic departments throughout Princeton University, a diversity of mutually beneficial research collaborations, and our location, amidst the greatest concentration of chemical and pharmaceutical industrial research laboratories in the United States. The Department of Chemical and Biological Engineering's graduate programs are centered on the Doctor of Philosophy (Ph.D.) degree, and the majority of our students are doctoral candidates. Our department also offers two masters degree programs (Master of Science in Engineering, Master of Engineering) geared toward practicing engineers interested in expanding their knowledge, who generally come with financial support from their employers or an external fellowship. All three graduate programs are based on the principles of chemical engineering, chemistry, biochemistry, biology, mathematics, physics, and related science and engineering disciplines.