He has excavated at Tel Arad, Tel Megiddo and Tel Dan. He teaches at the Hebrew Union College and has taught at Tel Aviv University, Hebrew University and at Johns Hopkins University. He specializes in mortuary archaeology, religion and ritual in the Chalcolithic period, ground stone artifacts, and the Middle Bronze Age and the early Iron Age of the southern Levant. Since 2005, he has directed the excavations at Tel Dan in northern Israel. He is the editor of the journal NGSBA Archaeology. David has just completed a sabbatical year at the Center for the Study of Origins of the University of Colorado, Boulder. He has recently begun writing about the use of psychotropic substances in the ancient Near East.