Brown is transferring from Temple, where he played eight games for the Owls in the 2024-25 season.
Penn State was previously ranked 13th in the USA Hockey Poll.
The announcement comes after the Nittany Lions secured a spot in the Frozen Four on Sunday.
The Nittany Lions dropped three spots after their loss to Maryland over the weekend.
Both teams went to the national semifinals last season.
Eight Lady Lions have hit the portal.