Rubuta ci gaba don wannan sakin layi - Husain ya shiga Ma'aikatar Harkokin Wajen Pakistan a matsayin memba na rukuni na farko a 1949. Ya yi aiki a wurare daban-daban a ofisoshin diflomasiyyar Pakistan a Indiya, Netherlands, United Kingdom da Thailand. Ya kasance babban kwamishinan Pakistan a New Delhi daga 1961 zuwa 1964. A cikin 1968, an nada shi a matsayin babban darakta a Ma'aikatar Harkokin Wajen Pakistan tare da matsayin Jakadan. An nada shi a matsayin jakadan kasar Algeria a shekarar 1971 amma saboda yunkurin samun 'yancin Bangladesh
, an tsare shi a Karachi, Pakistan. Ya raka Zulfikar Ali Bhutto a cikin tawagar gwamnati zuwa Beijing (Beijing na yanzu) a watan Nuwamba 1971.