Mark Seifter is a game designer at Paizo, working mainly on the Pathfinder RPG. Mark started with Pathfinder Unchained and Occult Adventures, moving on to Bestiary 5, Ultimate Intrigue, Horror Adventures, Villain Codex, and Ultimate Wilderness. He is a creator of the Starfinder and Pathfinder 2nd Edition RPG core engines and is currently working on the open playtest for Pathfinder 2nd Edition. In addition, he is a freelance author of various Paizo products including Aquatic Adventures as well as various products from other publishers.