In “The Tell”, who were the names of the four archaeologists leading the dig at Tell Makor, and what was the main job of each of these four people?

Dr. John Cullinane is the excavation's lead director. It is his ultimate decision to excavate two trenches on the tell and he decides just where they would be dug. As the leader of the excavation, Cullinane is also responsible for drafting the field reports and the final analysis of the excavation for publication. He is also well trained in biblical research which helps him understand the ancient cultures that lived at Makor.
Ilan Eliav is the excavation's chief administrator. As such, he is in charge of the on-the-ground management of the dig. He organizes the work of the excavators and makes the initial catalogs of significant artifacts. He is tasked with protecting the historical heritage of the site. He also represents the Israeli government, who, in the end, has final oversight of the excavation's operations. Eliav is often the one who challenges Cullinane the most, forcing him to truly consider his own approach to the excavation's operations.
Vered Bar-El is the chief ceramic specialist. Ceramics are crucial for many aspects of an excavation. They help archaeologists date the finds and associate strata with particular cultures and civilizations. As such, Bar-El's knowledge and expertise help illuminate much of what is unearthed at Makor.
Jemail Tabari is the excavations lead scientific archeologist. He studies things such as soil makeup and prepares samples to be sent to the labs for things such as radio-carbon dating. Although the novel does not go into much detail as to what exactly Tabari does in terms of scientific analysis, we see him mostly in action as the person with the most local knowledge. He knows the people of the area, how to find laborers, and how to best please the excavation's funders. In this sense, Tabari serves as the excavation's main "fixer."

The four archaeologists at Tell Makor represent different national, cultural, and religious perspectives that figure in the novel. They are three men and one woman.
John Cullinane, the excavation's lead archaeologist, is from Chicago. He is a multi-faceted linguist and scientist. In addition to his excellent academic qualifications, this Catholic is presented as having religious tolerance and great interest in the area's Jewish traditions.
Jemail Tabari, who studied archaeology at Oxford, is an Arab descended from the early inhabitants of the site area. He carries out most of the scientific analyses. He has a history of fighting against Jews but now works with them. It is with Ilan Eliav, who is Jewish, that he participates in finding the well they hoped to uncover.
Ilan Eliav is charged with safeguarding the Israeli cultural patrimony. An ardent Israeli patriot, once a German refugee in World War II, Eliav—formerly Gottesmann—had fought as a youth in the pre-independence forces in Galilee.
Vered Bar-El, a ceramic specialist, is a Jewish woman. Despite her long history and apparent romantic involvement with Eliav, she features in a surprise plot twist. In her youth, she was an active anti-Arab combatant.