About Jack

Jack Kosto is a metal guitarist, mixing and mastering engineer, and songwriter, best known for his work with Symphonic Metal bands Seven Spires and Threads of Fate. Specializing in dark, theatrical music, Jack is a perfectionist when it comes to both technicality and musicality. He is also an avid lover of audio production and recording, and is passionate about creating massive, energetic, and polished recordings, from source tones to final masters.
Jack began his musical career after learning classical viola in early elementary and middle school, and he was performing with a high school youth orchestra while only in the 6th grade. After seeing a clinic by shred guitar master Michael Angelo Batio in his hometown, Jack picked up the electric guitar, which became his first true love and primary focus. In addition to Batio’s mentorship and influence, Jack is heavily inspired by his longtime Berklee Guitar teacher Joe Stump, as well as Jeff Loomis (Arch Enemy, Nevermore), Steve Vai, Michael Amott (Arch Enemy), and Joe Satriani. Jack also draws influence from more modern bands and guitarists like Kamelot, Fleshgod Apocalypse, Nightwish, Insomium, and Ola Englund (Feared, the Haunted). Jack’s production idols include Jens Bogren, Andy Sneap, and Chris Lord-Alge. 

Jack was accepted and began his studies at the prestigious Berklee College of Music at the young age of 15, and graduated with a degree in Performance in the spring of 2016. At Berklee, he studied Jazz and Classical harmony and concepts, and he brings those to the table when writing for his main project, Seven Spires (sevenspiresband.com), which he co-founded with Vocalist and main songwriter, Adrienne Cowan. Seven Spires released their debut album, "Solveig", on August 4th 2017.

In 2018, Jack joined forces with John Pyres and Vikram Shankar (Lux Terminus, Redemption) in forming Threads of Fate, driven to create music that combined the bombastic, dramatic nature of cinematic music with the aggressive elements of metal, along with emotional, deeply personal lyrics inspired by the human experience. The debut EP "A Funeral For The Virtuous" was recorded during the summer of 2018, with a release slated for November.
In his limited spare time outside of music, Jack enjoys drinking espresso-based beverages, traveling, cooking, and relaxing at his South Carolina home.


"Fierce riffage combined with some blazing single note action- Jack Kosto’s playing on the new Seven Spires record is really quite good. Also, when considering the fact that Jack’s still a young player with years of development ahead of him, it`s even more impressive. In time I can see Jack evolving into one monster of a metal player." - Joe Stump


"While one could wax poetic about the entire band’s efforts here, a little spotlight should go towards vocalist Adrienne Cowan and guitarist Jack Kosto. Both seem to play well beyond their years, and their dynamic is cultivating something special here. Kosto’s flashy yet tasteful leadwork throughout with varied riffing approaches bodes well for even greater things to come... Solveig is an album made by musicians who want to change the game. Not confined by mere genre conventions and tropes, Seven Spires goes the distance to create a theatrical album that flows between beauty and extremity, and all points between. The sky is the limit as they continue onwards"- Kyle McGinn, Deadrhetoric.com


"Jack Kosto has the intricate, arpeggio free-flowing skills down pat – consistently unleashing fiery licks and tapping tricks at his disposal, but maintaining proper restraint and song advancement at the heart of his riff choices and transitions, most evident on the blackened speed twists for the conclusion of “Closure”. - Matt Coe, Deadrhetoric.com