Buuxi weedha soo socota: Bishii Nofeembar 5, 1981, Pope John Paul II wuxuu u magacaabay Micallef inuu noqdo Vicar Apostolic ee saddexaad ee Kuwait. Waxaa la caleemo saaray by Pope laftiisa on iidda Epiphany ee 1982. Bishii Janaayo 15 ee isla sanadkaas, waxaa si rasmi ah loogu dhajiyay inuu yahay Vicar Apostolic of Kuwait iyo Titular Bishop of Tinis in Proconsulari. Micallef wuxuu ku sugnaa Kuwait City intii lagu jiray
Dagaalkii Ciraaq ee 1990 kii, mid kamid ah dagaaloowgii ugu horeeyay ee Ciraaq lagu soo qaado.