Dumitriu started his youth career with Rapid București and made his senior career debut with Metalul Târgoviște in 1964. After a year, he moved to ASA Târgu Mureș, where he spent three years. In 1968, he signed with Steaua București, where he played until 1972. In the same year he joined Bucharest city rivals Rapid București. He also played for Olimpia Satu Mare, FCM Galați and ICSIM București.
