Colorado State University

What you'll study

This PhD is primarily research-driven and combines advanced coursework with sustained laboratory investigation. Students develop a bespoke curriculum in consultation with their advisory committee; typical areas of emphasis include molecular and cellular microbiology, immunology, host–pathogen interactions, microbial genetics, microbial ecology and metagenomics, structural biology, and computational/bioinformatic approaches to microbial data.

• Core training: graduate-level courses in microbial physiology and genetics, advanced immunology, experimental design, and quantitative methods for analysing biological data.
• Electives and specialised modules: pathogen genomics, microbial ecology and environmental microbiology, vaccine development and immune therapeutics, systems immunology, protein structure and function, and advanced bioinformatics.
• Laboratory rotations: early-stage rotations with different faculty labs (where applicable) to identify a thesis laboratory and broaden technical skills.
• Research dissertation: independent, original research culminating in a doctoral dissertation and defence. Projects often involve interdisciplinary collaborations across veterinary medicine, environmental science, public health and agricultural sciences as part of CSU’s One Health focus.
• Professional development: teaching experience, grant-writing workshops, ethics in research, scientific communication and opportunities for presenting at conferences and publishing in peer-reviewed journals.
• Assessment milestones: qualifying or candidacy examination, formation of a supervisory committee, annual progress reviews, and the final dissertation defence.

Entry requirements

Applicants should hold a bachelor’s degree in biology, microbiology, biochemistry, immunology or a closely related discipline; a master’s degree can be beneficial but is not always required. Successful candidates demonstrate substantial laboratory research experience, strong academic records, and a clear research statement that aligns with departmental faculty expertise.

• Academic transcripts: official transcripts from all post‑secondary institutions attended.
• Research experience: demonstrated laboratory experience and recommendation letters that describe research potential and independence.
• Statement of purpose: a statement describing research interests, relevant experience, and preferred faculty mentors or research groups.
• References: typically three letters of recommendation from academic or professional referees familiar with the applicant’s research ability.
• English language proficiency: for applicants whose first language is not English, an approved proof of English proficiency is required.
• Additional materials: curriculum vitae and representative publications or writing samples when available. Some applicants may be invited to interview with prospective advisers; admission decisions prioritise fit with faculty research programmes and available mentorship/funding.

Career prospects

Graduates of this PhD programme pursue careers across academia, industry and public service. Typical pathways include university faculty positions and postdoctoral research, research scientist roles in biotechnology and pharmaceutical companies, and technical or leadership roles in government and public-health laboratories. Other common careers are in translational research, vaccine and therapeutic development, microbial genomics and diagnostics, environmental and agricultural microbiology, regulatory science, and science policy or communication. The training also equips graduates for roles in data‑driven fields such as bioinformatics and systems biology.

Why study at Colorado State University

Colorado State University offers access to diverse research infrastructure, including well‑equipped molecular and imaging facilities, high‑throughput sequencing and bioinformatics resources, and opportunities for interdisciplinary collaboration across veterinary medicine, ecology and public health. The department emphasises mentorship, hands‑on research training and a collaborative environment with active faculty working on infectious disease, immunity, microbial ecology and translational science. The university’s location and institutional focus support One Health approaches, enabling projects that bridge human, animal and environmental health.