Michael Beattie is a Canadian actor and voice actor. He is best

Michael Beattie - Principal Erickson's voice actor

known for his roles as Buck and Chief Delaney in The Adventures of T-Rex, Needle in Conan: The Adventurer, Mordin Solus in Mass Effect 2, Bladewolf in Metal Gear Rising: Revengeance (English version), VNC Announcer and Walter Jr. in Minions, Tattoo in The Secret Life of Pets, The Scar Faced Man and TMZ Announcer in Despicable Me 3 and several others. 

He provides the voice of Principal Erickson. He provides the voice of a cameraman in Battle of the Bands