Board Thread:Speculation House/@comment-174.255.201.0-20170507034806/@comment-26397825-20170507043438

Ozpin helped build Haven Academy, he stated this himself, and Miles said the reason the Academies use teams is because Ozpin believes in teamwork so strongly, which means he influenced the start of each academy and how they run as well.

We don't know how old he is, but it's believed his previous body was at least 80 years old, since he had helped build Haven.