ICS Vortex, born Simen Hestnæs on February 14, 1974, is a Norwegian musician known for his work in the metal genre, particularly within progressive metal and symphonic metal. He gained prominence as the vocalist and bassist for the avant-garde black metal band Arcturus, where his operatic singing style and theatrical presence contributed significantly to the band's distinctive sound. Vortex's notable works include his collaborations with Arcturus, especially on albums like "La Masquerade Infernale" (1997) and "Sideshow Symphonies" (2005). He is also recognized for his role in Dimmu Borgir, where he contributed to the critically acclaimed album "Death Cult Armageddon" (2003) and performed on their subsequent tours. In addition to his work with these bands, ICS Vortex has released solo material, including his 2010 album "Storm Seeker," showcasing his versatility and creativity as an artist. His impact on music lies in his ability to blend various elements of metal with classical influences, pushing the boundaries of the genre and inspiring a new generation of musicians. Vortex remains a respected figure in the metal scene, known for his unique vocal style and artistic vision.