Following his undergraduate studies, Al-Alwani returned to Iraq and became a lieutenant in the Iraqi Military Reserves. He taught in the Military Academy of Iraq in Baghdad and also taught in the College of Islamic Studies where he was a professor for 6 years. While in Baghdad Al-Alwani studied with some of Iraq's most prominent figures including: Sheikh Amjad al-Zahawi, Sheikh Qasim Al-Qaysi, (Grand Mufty of Iraq), Sheikh Mohammad Fu'ad Al-Aloosi, Sheikh Abdul 'Aziz Salem Al-Samerai, Sheikh Mohammed Al-Qazilchi. Al-Alwani led Jummah (Friday Prayers) in the famous Mosque of Hajja Haseebah Al-Pachatchi from 1953 until 1969. He was forced to leave Iraq in 1969 due to his opposition of the Ba'ath party.