[popnbrown]

I would say a mixture. Because you want to show the judges how your "team" has accomplished those objectives, but also show them how "your" team has done this.

What I mean by that is, Team Alchemy is an object, sure, and when you talk about what it has accomplished that's mostly objective. However, this team is run by you, your fellow student colleagues, and your mentors. There are many teams out there, that have Chairman's essays that have personal stories of overcoming obstacles and so on.

So in conclusion, don't worry about what tense or perspective it is in, all you need to make sure is that the message that you want your reader to get (essentially that you are accomplishing or striving towards those objectives) is told in that essay.

Hope that helps!

--Sravan