The negative impact of international crises on the health of the international community has made international law, which includes rules, institutions and processes related to health, ipso facto a part of the discussion. It has become a necessity for health professionals to know this mutual relationship between health and international law. This can be possible through training. The initial attempts to provide international law education to healthcare professionals date back to the 1980s, and the development of approaches in this field has become possible in the following years. Some western universities enabled healthcare professionals to receive such training by arranging their tertiary curriculums. Some institutions also offer courses in this direction. This article discusses the competencies of healthcare professionals, who are trying to solve the health crisis caused by the Ukraine-Russia war, regarding international law. In this context, healthcare professionals of the international non-governmental organisations operating in Ukraine and the Ukrainian health system constitute the aforementioned healthcare professionals. It is a fact that those working on behalf of non-governmental organisations are familiar with international law due to their mission. On the other hand, there is a systematic deficiency in the training of Ukrainian healthcare professionals on international law. The ad hoc training planned after the start of the war contributes to a certain extent to the elimination of this deficiency.