Fitz Vanderbuilt is a Sentinel Faction Engineer NPC who operates at the Sentinel Base Camp in Avant Gardens. Fitz Vanderbuilt grew concerned when he saw that there was a gaping hole in the Sentinel Base Camp's wall. He sends players to the Monument to collect six Tile 1x8 bricks. Then, he asks players to use the bricks to quick build a barricade to cover the hole in the wall. Fitz Vanderbuilt rewards them for their efforts with more backpack space.