He has directed numerous excavations and epigraphic expeditions, at sites including the entire mountain of El-Hawawish (in excess of 800 Old Kingdom and First Intermediate Period rock-cut tombs), Quseir El Amarna, El Hagarsa (near Sohag), Deir El Gebrawi, Giza, as well as the Unis and Teti pyramid cemeteries at Saqqara.