Becoming an important member of Menelik's entourage, Heywät served as a senior counsel and advised on and was a strong proponent of Ethiopia's
modernisation. Specifically, Heywät sought to integrate Ethiopia into the global economy while maintaining Ethiopia's cultural and political integrity. Deeply concerned with the state of the Ethiopian economy, and understanding the economic importance of a productive middle class, Heywät pushed for structural social, political, and economic reform, which are partially reflected in efforts to remove unjust taxation and
patrimonialism, while bureaucratic rationalism, the prohibition of slavery, and the elimination of noble privileges were promoted. Heywät exerted a considerable degree of influence over Menlik's making of policy, which was compounded by the influence of other senior policymakers that were informally grouped as the 'Young Japanisers' - a loose grouping that sought to replicate Japan's industrialisation, which included the likes of
Heruy Wolde Selassie. A lead advocate of industrialisation, Heywät's publication of
Government and Public Administration advised the emperor to 'follow the example of the Japanese government' or 'be enslaved'. Following Menelik's death and the 1916 coup, he was first appointed controller of the (French built) railways and later collector of customs in Dérre Dawa, where he died. ==Major works==