Od 1919. bio načelnik higijenske službe Ministarstva narodnog zdravlja (Odjeljenje za rasnu, javnu i socijalnu higijenu) u Beogradu; postavio je temelje javnozdravstvenoj službi u Jugoslaviji i osnovao niz socijalno-medicinskih ustanova. Izgrađujući naprednu medicinu došao je u sukob s komercijaliziranom medicinom, a zbog svoje socijalnodemokratske ideologije postao je nepoćudan vladajućim krugovima. Nakon prisilnog umirovljenja 1931. bio je stručnjak Zdravstvene organizacije Lige naroda u Kini. Zaslužan je za reformu nastave na zagrebačkom Medicinskom fakultetu, osnivanje Više škole za medicinske sestre i Medicinskog fakulteta u Rijeci. Izradio je ustav Svjetske zdravstvene organizacije te je 1948. predsjedao Prvoj svjetskog zdravstvenoj skupštini u Ženevi. Bio je prvi potpredsjednik Ekonomskog i socijalnog vijeća OUN-a.

Since 1919. was chief sanitary services of the Ministry of Public Health (Department for racial, social and public hygiene) in Belgrade, laid the foundations of public health service in Yugoslavia and established a series of socio-medical institutions. Building advanced medicine came into conflict with the commercialized medicine, and because of its social-democratic ideology has become the ruling circles grata. After being forced into retirement 1931. he was an expert League of Nations Health Organization in China. He is responsible for the reform of teaching at the Zagreb Faculty of Medicine, the foundation of the College of Nurses and the Medical Faculty in Rijeka. Prepared by the Constitution of the World Health Organization in 1948. chaired by the First World Health Assembly in Geneva. He was the first vice-president of the Economic and Social Council of UN.