Movies:
1. "Jar City" (2006): Sigurdsson played the supporting role of a police officer named Ólafur.
2. "Noi the Albino" (2003): He portrayed Kiddi, a friend of the protagonist Noi.
3. "Reykjavik 101" (2000): Sigurdsson had a brief but memorable appearance as Bjarni.
4. "Angels of the Universe" (2000): He essayed the character Karl Hreinsson in this Icelandic comedy-drama.
5. "NoSuchThing" (2001): Sigurdsson played the lead role of Bragi Sveinsson, a man dealing with the disappearance of his wife.
6. "Börn Náttúrunnar" (2014): In this critically acclaimed drama, he appeared as the character Ingimundur.
Television Projects:
1. "Trapped" (2015-2016): Sigurdsson's notable performance as Trausti Einarsson, the Chief of Police, drew international attention in this popular Icelandic crime drama.
2. "Black's Game" (2012-2015): He had a significant role as Gunnar in this Icelandic detective television series.
3. "Fangar" (2017): Sigurdsson played a main character, a prison therapist named Helgi Kristjánsson, in this acclaimed drama set in an Icelandic prison.
4. "The Valhalla Murders" (2019): He appeared as Arnar Geir, a police colleague of the protagonist Kata, in this English-language Icelandic crime drama.
5. "Beforeigners" (2019-present): Sigurdsson portrays Lars Haaland, a police detective, in this Norwegian science fiction crime drama.
6. "Katla" (2021): He had a supporting role as Þór in this Netflix Icelandic fantasy drama revolving around a volcanic eruption.
Sigurdsson's performances are characterized by his engaging screen presence, emotional range, and ability to play diverse characters successfully.