Sven Gabriel Holtsmark is a Norwegian historian and Russian studies scholar. He is a full professor (chair) of history at the Norwegian Institute for Defence Studies, and formerly served as its director. Holtsmark has primarily worked on Soviet, Russian, and East German politics and foreign policy, as well as Norwegian and Nordic foreign and security policy history. He has contributed to the understanding of Norway's relations with the Soviet Union and Russia, particularly in the context of the High North and the Arctic. Holtsmark is a frequent commentator on defence policy and Russian foreign and military policy in Norwegian media, including on the Russian invasion of Ukraine. Holtsmark has publicly criticized fellow academics whom he believes promote narratives aligned with Russian propaganda, particularly in the context of the 2022 invasion of Ukraine.