Rahmann attended a School of Arts in Maryborough and in 1899 he won a certificate for academic merit in physics. In 1900 he graduated primary school and received a scholarship to study at any Grammar School in Queensland free of charge, and he enrolled in Maryborough Boys Grammar School, receiving a medal for arithmetic in 1902. As of 1907 he had graduated and become an assistant teacher working on probation at
Irvinebank State School, and in 1911 he was admitted to the Department of Public Instruction as a full teacher. In January 1912 he moved from Irvinebank to
Manly State School as an assistant teacher, and in August he moved to Warwick High School as assistant teacher. In 1915 he was promoted from a Class III division 1 teacher to a Class II division 3 teacher, and transferred to Gympie High. In January 1916 Rahmann married Effie Winifred Marquis in Christ Church in Bundaberg and they took the evening train to Gympie after the service. At some point the Rahmann's moved to Brisbane where they had a daughter, Marjorie, in 1920, and a son, John in 1925, and Rahmann became officer-in-charge of evening classes at the teachers' training college by 1926. ==Cricket career==