Saydam became the vice-president of the Department of Health of the Ministry of War on 1 December 1913 and was promoted to the rank of major on 1 June 1915. Meanwhile, he established the Institute of Bacteriology and his vaccines against epidemics and especially typhus had been effective.
Saydam took on the role of vice-president at the Department of Health within the Ministry of War on 1 December 1913, was elevated to the rank of major on 1 June 1915. In addition, he founded the Institute of Bacteriology and his vaccines against outbreaks and particularly typhus proved successful.