Use 1st or 3rd person for university webpage description?
I think that it depends on whether the web site is written from a personal or an institutional perspective.


Personal perspective: On my own web page, I use first person because I have formatted it as a web page about me personally and about my personal work.
Institutional perspective: A close colleague of mine has formatted their page as "Name Laboratory", and it includes description of both themselves and of all of the students and postdocs in their group.  Their web page is written in the third person, including their self-description, because it is from outside perspective of the group as a collective, rather than their own perspective.


Just as in most questions of writing and tense, either can be correct, and I think the question is really about which you feel most comfortable doing.