Simcock was born in Bangor, Gwynedd. At the age of eleven he attained the highest marks in the country for his Associated Board on both piano and French horn. He studied classical piano, French horn, and composition at Chetham's School, Manchester, where he was introduced to jazz by pianist and teacher Les Chisnall and bassist and teacher Steve Berry. He studied jazz piano at The Royal Academy of Music, London with John Taylor, Nikki Iles, Nick Weldon, and Geoff Keezer. He graduated from the Royal Academy of Music and won the "Principal's Prize" for outstanding achievement. At the Royal Academy of Music he studied with Milton Mermikides.

In 2006, he was the first jazz musician to be selected for the BBC Radio 3 New Generation Artists scheme, and this was extended to 2008. It involved broadcasts on BBC Radio 3 as solo performances, and his trio appearance at the Wigmore Hall during the London Jazz Festival 2006 (broadcast 7 July 2007).

In 2008, he was commissioned to perform at The Proms at the Royal Albert Hall in London. He composed a Piano Concerto "Progressions" which he performed with his trio and the BBC Concert Orchestra on 9 August 2008, broadcast live on the television channel BBC Two.

On 5 October 2008, he was featured in an evening at the King's Place Opening Festival in which he performed four concerts leading four different groups including a duo with John Taylor.

His trio, which has performed at festivals and venues worldwide such as the North Sea Jazz Festival 2007, features James Maddren (drums) and Yuri Goloubev (bass), while his debut album featured Stan Sulzmann, John Parricelli, Phil Donkin, Martin France, and Ben Bryant.

He was chosen by Chick Corea for a solo concert performance and live recording at Klavier Festival Ruhr 2007. This concert was broadcast on WDR radio and 20,000 copies were given away as a cover mount CD in Germany's leading music magazine Fonoforum.^[1]

He was a member of Tim Garland's Lighthouse Trio, but he left in 2013 and was replaced by John Turville. He was a member of Malcolm Creese's Acoustic Triangle, Stan Sulzmann's Neon, and Bill Bruford's Earthworks. He has also played with Dave Holland, Lee Konitz, Bob Mintzer, Bobby McFerrin, Kenny Wheeler, Iain Ballamy, Julian Argüelles, Pete King, Don Weller, Steve Waterman, and Torsten de Winkel / New York Jazz Guerrilla. He is a founding member of The Impossible Gentlemen.

He also plays French horn^[2] and has played with the National Youth Jazz Orchestra (NYJO), the BBC Big Band, and with Kenny Wheeler on his 2003/2005 tour.

He has toured with jazz guitarist Pat Metheny in a quartet with Linda Oh and Antonio Sanchez.

In 2011 his album Good Days At Schloss Elmau was one of the twelve nominees for the Mercury Music Prize, losing to PJ Harvey's Let England Shake.^[3]

• A commission to compose and perform a piano concerto with the BBC Concert Orchestra at the Proms 2008 at the Royal Albert Hall in London (Progressions)
• A commission for a new work for the Aronowitz Ensemble at the City of London Festival, July 2008
• A commission and recording for a piano concerto with big band with the NDR Big Band in Germany (Hamburg Suite)
• A Big Band project at Cheltenham Jazz Festival 2007, broadcast on BBC Radio on 1 June 2007 (The Lichfield Suite)
• A 2007 commission and tour with The Scottish Ensemble (Chamber Orchestra), broadcast on 1 July 2007 on BBC Radio Scotland and again on BBC Radio 3 on 12 October
• Guest soloist on Mark Antony Turnage's commission with London Sinfonietta for the re-opening of the Southbank Centre at Queen Elizabeth Hall, June 2007
• A commission for the Britten Sinfonia, premiered at the London Jazz Festival 2007 (Jackie's Dance)
• New Horn Sonata performed at the Wigmore Hall with French horn player Chris Parkes
• Performed the première of Tim Garland's piano concerto with the Northern Sinfonia, May 2005
• A commission and major Arts Council-funded tour of cathedrals with Acoustic Triangle and Sacconi Strings, 2008
• Performing with his trio at the BBC Young Musician of the Year Jazz Award 2014 and 2016 with the finalists of the competition

• Winner of Perrier Award 2001: Young Jazz Ensemble
• Winner of BBC Jazz Award 2005: Rising Star
• Winner of British Jazz Award 2005: Rising Star
• Nominated for Parliamentary Jazz Awards 2007: Jazz Musician of the Year
• Nominated for BBC Jazz Award 2008: Best Instrumentalist
• Nominated for BBC Jazz Award 2008: Best Album
• BBC Radio 3 New Generation Artist 2006–2008
• Nominated for Radio 3 Listeners' Awards 2008
• Nominated for Barclaycard Mercury Music Prize 2011

As leader edit

• Perception (Basho, 2007)
• Blues Vignette (Basho, 2009)
• Good Days At Schloss Elmau (ACT 2011)
• Instrumation (ACT, 2014)
• Reverie at Schloss Elmau with Yuri Goloubev (ACT, 2014)
• Birdsong with Kizzy Crawford (Basho, 2018)
• Near and Now (ACT, 2019)

As sideman edit

• Catalyst, Acoustic Triangle (Audio B, 2003)
• Close to You, Kathleen Willison (Basho, 2004)
• Resonance, Acoustic Triangle (Audio B, 2005)
• If the Sea Replied, Tim Garland (Sirocco Music, 2005)
• Take Me Home, Kaz Simmons (33 Jazz, 2005)
• Heart Luggage, Klaus Gesing (ATS, 2006)
• Sax of Gold, Sax Assault (Astute Music, 2007)
• Traces, Dan Stern (Kvetch, 2007)
• Due North, Tim Garland (Jazzaction, 2007)
• Reverence, Spike Wells (Audio-B, 2007)
• Video Anthology Vol. 1: 2000's, Bill Bruford's Earthworks (Summerfold, 2007)
• SGS Group Inc. Presents, Simcock/Goloubev/Sirkis (Music Center, 2008)
• Give It One, London Horn Sound (Cala, 2008)
• Smoke and Mirrors, Tom Richards Orchestra (Candid, 2008)
• 3 Dimensions, Acoustic Triangle (Audio B, 2008)
• Finally Beginning, John Warren (Fuzzy Moon, 2008)
• Bimbache Jazz & Raíces, La Condición Humana (nyjg / ESC, 2008)
• Howeird, Sam Crockatt Quartet (Loop, 2009)
• Metafore Semplici, Yuri Goloubev (Universal, 2009)
• Libra, Tim Garland (Global Mix, 2009)
• Following On, John Warren (Fuzzy Moon, 2009)
• The Impossible Gentlemen (Basho, 2011)
• Internationally Recognised Aliens (Basho, 2013)
• Let's Get Deluxe (Basho, 2016)
• From This Place, Pat Metheny (Nonesuch, 2020)

• http://www.spiegel.de/kultur/musik/0,1518,537613,00.html
• https://web.archive.org/web/20080222093747/http://www.br-online.de/bayern4/sendungen/jazz/
• http://www.birminghampost.net/life-leisure-birmingham-guide/birmingham-culture/classical-music-birmingham/2007/11/29/britten-sinfonia-uncovers-hidden-treasure-65233-20180607/

• Official website
• Profile on Basho Records website
• Gwilym Simcock biography from BBC Wales
• Profile at BBC Wales North West