Sigtryggur Berg Sigmarsson (b. 1977) is an Icelandic musician and sound artist, founding member of [[artist:Stilluppsteypa]]. Sigmarsson was born in Akureyri, Iceland and studied sound art at the Fachhochschule in Hannover, Germany from 1998 to 2003.

Apart from being a member of Stilluppsteypa, he released a number of solo albums in the early 2000's on such labels as [[label:Trente Oiseaux]], [[label:ERS]], [[label:Helen Scarsdale Agency]], [[label:Fire Inc.]] and [[label:Bottrop-Boy]]. He is also a member of 'laptop orchestra' [[artist:Evil Madness]].

After a long break in solo career, Sigtryggur started releasing solo records again in 2013, and already published over a dozen of albums on CD/CDr, cassette and LP, mostly for the reanimated [[label:Some (2)]] label (used to be a sub-label on defunct Fire Inc., now operating separately). Among new albums there are also collaborations with [[artist:BJNilsen]], [[artist:Franz Graf]], [[artist:Tom Smith (2)]] from USA and [[artist:Malneirophrenia]] trio in Iceland.