Ministers extend Shin Bet chief's tenure by 4 months Vote comes following disagreement between Gantz and Netanyahu over the latter's proposal to nominate his confidant, National Security Advisor Ben-Shabbat, to head the security agency Itamar Eichner, Attila Somfalvi | Published: 04.11.21 , 17:35 Ministers Sunday voted to extend Nadav Argaman's tenure as the chief of the Shin Bet security service by four more months. Argaman's tenure was set to end in May after heading the agency for 5 years, but will now last at least until September. 3 צפייה בגלריה (Photo: Ohad Zwigenberg) This vote comes following a report by Ynet's sister outlet Yedioth Ahronoth saying that Defense Minister Benny Gantz opposed attempts by Prime Minister Benjamin Netanyahu to nominate his confidant, National Security Advisor Meir Ben-Shabbat, to head the security agency.