Ragnar Leif Ulstein MM (19 April 1920 – 3 December 2019)[1] was a Norwegian journalist, writer and resistance member.

Later that year he fled to the United Kingdom due to World War II and the German occupation of Norway.

[2] In 1943 he was a part of the failed operation Vestige I, which involved placing limpet mines on ships in Svelgen harbor.

The actual mine placing was performed by Harald Svindseth, but the explosives went off too early, and the ship was docked instead of sinking.

[4][5] Svindseth built up a Milorg subgroup near Svelgen with the codename Snowflake, whereas Ulstein led the group Siskin.

Important local contacts were Olav Rise in Leikanger as well as Nils Knagenhjelm and Hans H. H. Heiberg in Kaupanger.

German forces approached Fosskamben, but local residents secretly slowed down their travel, giving Siskin members time to hide a large weapons cache and to escape.

He co-edited the official two-volume work on the NOR.I.C.1 company, Kompani Linge, issued in 1948, together with Erling Jensen and Per Ratvik.