Principal investigator (PI)

A principal investigator (PI) is the person a funded research project names as its scientific or technical lead, and who answers to the funder for how the work is directed and reported.

How it works in a university-industry collaboration

Each funder defines the role in its own words. NIH calls it program director or principal investigator (PD/PI), the person the applicant organization gives "the appropriate level of authority and responsibility" to direct the project, and it allows multiple PD/PIs who share that leadership (NIH Grants Policy Statement 1.2). NSF counts anyone who contributes "in a substantive, meaningful way" to the work, treats PIs and co-PIs as equals, and names the first one listed as the contact PI (NSF PAPPG, Exhibit II-3).

The PI doesn't sign the award for the institution. That's the signing official, usually in the sponsored programs office. On an SBIR or STTR, where the PI is employed decides which program fits, and our SBIR and STTR guide covers the rules.

Translation Box: PI

On the academic side: the faculty member who wins the grant, runs the lab, sets the research direction, and supervises the students and postdocs who do the work.

On the industry side: often the technical lead named on a grant or contract, who may not control the budget or the team. Inside a company the same person might be called a project lead or principal scientist.

What Helikon does with it

On the Helikon platform, Partner Search ranks researchers against your abstract or specific aims, and each researcher's Funding tab lists the awards their published work acknowledges, a quick check that someone has led funded work before.