Becoming a Principal Investigator: How an MS Can Help

What is a principal investigator? These research leaders drive the medical and scientific breakthroughs that save lives. They secure funding for groundbreaking studies, design experiments, analyze results and publish findings that shape healthcare policy.

From cancer research to vaccine development, principal investigators (PIs) turn scientific questions into answers that improve health outcomes worldwide.

But this role requires strong credentials. Earning a Master of Science (MS) degree is often the first major step toward becoming a principal investigator.

Here’s what principal investigators do, what it takes to become one and the salary you can expect in this career.

What Does a Principal Investigator Do?

Principal investigators oversee major studies from start to finish. Their work begins well before the research starts and continues long after the last beaker is cleaned and put away. While some leaders simply give instructions, PIs are hands-on leaders at every stage.

Do you picture principal investigators spending all day pipetting samples in a lab? Think again. They work in universities, research hospitals, pharmaceutical companies and government agencies like the National Institutes of Health (NIH). Their daily work combines lab research, team management, data analysis and extensive writing — particularly grant proposals to secure funding for studies.

A typical week might include conducting experiments in the lab, analyzing data on specialized software, meeting with research team members to assign tasks and review progress, writing sections of a grant proposal and attending seminars to stay current on field developments.

Let’s walk through a clinical trial to see what their responsibilities might look like:

Before the trial, PIs:

Design the study
Write grant proposals to secure funding
Set research goals
Assemble the research team
Recruit trial participants
Get informed consent from participants

During the trial, they:

Lead the research team
Assign tasks
Conduct research
Provide ethical oversight
Ensure regulatory compliance
Protect trial participant privacy
Develop case report forms (CRFs)

After the trial wraps up, they:

Archive study data
Sign off on CRFs
Prepare study results for audit
Oversee publication and reporting

Sound like a lot of work? It is. But the outcomes can also be substantial — and fulfilling.

A principal investigator examines a microscope slide in a research laboratory.

What Research Areas Do Principal Investigators Work In?

Principal investigators work across diverse fields, creating opportunities for many different backgrounds and interests. Common specializations include:

Cell biology
Clinical research
Epidemiology
Immunology
Molecular biology
Molecular pharmacology
Virology

How Can an MS Degree Help You Become a Principal Investigator?

A principal investigator needs both academic credentials and practical experience. A Master of Science degree provides essential preparation for this career path.

Education Requirements

Many principal investigators hold an MD or a PhD. An MS degree lays the groundwork for both paths, making it a strategic choice for aspiring research leaders.

A PI’s typical educational pathway starts with a bachelor’s degree in a related field, followed by a master’s degree. From there, students can choose whether to pursue doctoral studies. An MS degree can prepare you for scientific doctoral studies, which are typically research-intensive.

For aspiring physicians, a relevant MS degree can strengthen medical school applications and build practical, applicable skills before entering medical school.

What Skills Does an MS Degree Build?

MS programs focus heavily on research — ideal preparation for a principal investigator. Students develop expertise they’ll use regularly in that role, including:

Graduate-level research skills
Leadership and team management experience
Field-specific medical or scientific knowledge
Analytical thinking skills
Problem-solving skills

Certification Requirements

Beyond a degree, principal investigators must be certified to tackle wide-ranging and significant duties. Requirements vary, but typical certifications are:

Certified Principal Investigator (CPI)
- After completing 3,000 hours of work experience, PIs can sit for the Association of Clinical Research Professionals (ACRP) CPI Exam. They must renew their certification every two years.
Good Clinical Practice (GCP)
- GCP training is offered free of charge by the NIH and is recommended no less than every three years.

What Do Principal Investigators Earn?

Salary ranges for principal investigators are competitive. Most positions pay near or above six figures, with some significantly higher.

PI Job Outlook

The job outlook for PIs is also strong. As of late 2025, there are more than 162,000 U.S.-based registered studies. Each one requires a principal investigator. Even with PIs juggling several projects at once, this number tells us:

Demand for principal investigators looks strong
The research community is working hard to fix critical health challenges

Ready to join the efforts of that vital community?

Choose Your Path to a Principal Investigator Career

A career as a principal investigator offers the chance to directly influence tomorrow’s medical treatments and transform lives through research.

The University of Florida’s online medical sciences degrees provide specialized, affordable paths toward this goal. Choose the program that fits your professional interests:

Not quite ready for a degree? Build skills and credentials in a 15-credit graduate certificate program.

Your journey to becoming a principal investigator starts here. Apply today.

Sources:
https://pmc.ncbi.nlm.nih.gov/articles/PMC3051859/
https://careers.iconplc.com/blogs/2025-2/the-role-of-a-principal-investigator-in-clinical-research
https://acrpnet.org/2022/02/15/the-clinical-research-investigator-clarifying-the-misconceptions

Becoming a Principal Investigator: How an MS Can Help