Joslyn was born in Pomona, California, but moved to Washington with his family when he was three and grew up on Bainbridge Island. His father is a family therapist and his mother is a Hungarian model, actress and artist. She came over to the United States after the Hungarian Revolution of 1956. Joslyn was raised Zen Buddhist from an early age, and both his parents run the Entsuan Zen center on Bainbridge. His half-brother Chris Kattan is a comedian who was famous for his work on and off Saturday Night Live, which he was active on from 1996–2003.
Joslyn began studying violin at the age of five, with the Suzuki string method, and grew up studying music composition and performance. Joslyn attended Bainbridge High School, graduating in 2001. Andrew received his B.A. in English Literature and Violin Performance from Western Washington University in 2005 and his Masters certificate in Music Business from the Berklee College of Music in Boston. While in college, he took part in studying contemporary music, ranging from rock, folk, fiddle, world, to hip-hop, film, and electronic musical genres.
Joslyn toured and wrote with the Pacific Northwest folk rock band Handful of Luvin’ from 2002–2010. After the release of their third album Life in Between, he left the band and started his own career as an orchestrator and composer, while working as an A&R manager at a Seattle Indie Record label.
In 2008, Joslyn began collaborating with Macklemore & Ryan Lewis on the Vs. EP, the Vs. Redux EP, and the chart-topping album The Heist. He co-wrote the tracks "Neon Cathedral" and also "Wings", which was used for commercials involving the 2013 NBA All-Star Game.
Joslyn worked with some known musicians, including: Macklemore & Ryan Lewis, David Bazan (Pedro the Lion), Allen Stone, Ivan & Alyosha, Mark Lanegan, Grieves and Budo (Rhymesayers).
In 2012, Joslyn partnered with Seattle songwriter Kris Orlowski to release the album, Pieces We Are The album reached no. 19 spot on the iTunes Singer-Songwriter charts, and the track "Mountains", was featured on episode 916 of Grey's Anatomy "This is Why We Fight." The album was also voted in the Top 15 EPs of 2012 by New York Music Blog, Wild Honey Pie.
Joslyn composed and arranged extensively for the Seattle Rock Orchestra. He leads the Neo-classical/Experimental group, The Passenger String Quartet, which has backed artists including Duff McKagan, Suzanne Vega, Daniel Bernard Roumain, folk legend Judy Collins, and DJ Spooky.
In early 2013 Andrew was hired to arrange strings and brass for American alternative rock icon Mark Lanegan for Imitations (album). In March 2013, Andrew arranged strings for Duff McKagan's film documentary, "It's So Easy and Other Lies", based on McKagan's book of the same title. The Passenger Quartet played the arrangements live at the Moore Theatre in Seattle along with McKagan and his band. Shortly thereafter, Andrew Joslyn was voted Best Accompanist by the Seattle Weekly Joslyn left his record label job in late 2013 to work full-time as a composer, arranger and performer.
In 2014, Andrew Joslyn collaborated with Seattle indie-rocker David Bazan to write the album: David Bazan and the Passenger String Quartet: Volume 1. Bazan and Joslyn toured the album nationally at the end of 2014.
Andrew Joslyn has performed live on TV with Mary Lambert on The Tonight Show with Jay Leno on January 10, 2014, Macklemore & Ryan Lewis at the 56th Grammy Awards on January 26, 2014, and with Macklemore and Ryan Lewis at the 2015 American Music Awards where they debuted the emotional new song "Kevin", which Joslyn helped co-write
In October 2016, Joslyn released the lead single of his solo record, "Plastic Heaven," and it was premiered both by Atwood Magazine, and Afropunk publications. In February 2017, Andrew Joslyn released his debut orchestral solo record, "Awake at the Bottom of the Ocean." The record is a stunning collection of genre bending, Orchestral Pop music and features Andrew's songwriting and arrangements along with the vocals of some of the most iconic Northwest musicians and beyond, including Mark Lanegan (Queens of the Stone Age), Shelby Earl, Adra Boo (Fly Moon Royalty), Will Jordan, Billy McCarthy (Augustines), Eric Anderson (Cataldo) and Susy Sun. Early features in Paste, Afro-Punk, City Arts, Yahoo Music, The Seattle Weekly and support from Seattle's taste-maker, KEXP, paved the way for a very successful first release. Paste Magazine gave the record a 9/10 rating. The record was in the top 50 records on KEXP's variety charts, and top 3 of the Northwest charts.
Andrew Joslyn is also a film composer, and worked on the comedy drama feature-length film "Always Learning" (2013), and the film shorts "Always" and "The Roar" by director Monish Gangwani. In 2017, Joslyn composed an original score for his first feature length film, "American Violence", starring Denise Richards, Bruce Dern, and Kaiwi Lyman-Mersereau.
He is listed as songwriter/composer on nearly fifty recordings in the BMI database.
2017 - Andrew Joslyn (Awake at the Bottom of the Ocean) - Composer, Producer
2016 - Chris Staples (Golden Age) - String Arrangement, Viola, Violin
2016 - Augustines (Augustines) - Strings
2016 - Macklemore & Ryan Lewis (This Unruly Mess I've Made) - String Arrangements, Strings, Composer
2015 – Roger Lion (Roger Lion) – String Arrangements, Strings
2015 – Lotus Crush (Rabbit Hole) – Strings
2015 – Susy Sun (Demons (Acoustic) Single)– Strings, String Arrangement
2015 – Susy Sun (Any Other Way (Acoustic) Single) – Strings, String Arrangement
2015 – Susy Sun (That's Just Life) – Strings
2014 – Augustines (Augustines) – Violin
2014 – Craft Spells (Nausea) – Viola, Violin
2014 – Grieves (Winter & The Wolves) – Strings
2014 – Blake Lewis (Portrait of A Chameleon) – Violin
2014 – V. Contreras (V. Contreras) – horn arrangements, string arrangements, viola, violin
2014 – Vaudeville Etiquette (Debutantes & Dealers) – string arrangements, violin
2014 – My Goodness (Shiver + Shake) – Strings
2014 – Kris Orlowski (Believer) – Orchestration
2014 – David Bazan + The Passenger String Quartet (Vol. 1) – Violin, composer
2014 – Mary Lambert (Heart On My Sleeve) – Violin
2014 – Tuatara (Underworld) – Strings, String arrangements
2013 – Mark Lanegan (Imitations) – String arrangements, viola, violin
2013 – Budo (The Finger & The Moon) – Violin
2013 – Susy Sun (Wanderlust) – Violin, String Arrangement
2013 – Kevin Long (Buena Vista) – Violin, string arrangement
2013 – Mary Lambert (She Keeps Me Warm) – String Arrangement, violin
2012 – Eric Tingstad (Badlands) – Violin
2012 – Macklemore & Ryan Lewis (The Heist) – composer, percussion, viola, violin, vocals
2012 – Sol (Yours Truly) – Violin
2012 – Lerin Herzer and Andrew Joslyn (The Girl and the Ghost) – Violin, viola, composer
2012 – Kris Orlowski and Andrew Joslyn (Pieces We Are) Orchestration, violin, viola, percussion
2011 – Grieves (Together/Apart) – Strings
2011 – Kris Orlowski & The Passenger String Quartet (Live at the Fremont Abbey EP) – composer, violin, string arrangements
2010 – The Halyards (Fortune Smiles) – Violin
2010 – Eclectic Approach (Jump Into Life) – Violin
2010 – Handful of Luvin’ (Life In Between) – electric 5 string violin, composer
2007 – Handful of Luvin’ (Land of Giants) – electric 5 string violin, composer
2005 – Handful of Luvin’ (Balance) violin, composer