Biografia Come musicista Iniziata l'attività come musicista nel 1988, nel 1990 è fondatore della band Threshold, nonché unico membro presente sin dall'inizio insieme a Richard West, e fu lui, nel 1991, a scegliere come etichetta per la band la Nuclear Blast.

Groom ha anche suonato la chitarra in Mercy Train, Shadowland e Strangers on a Train, tutti durante la metà degli anni 1990. Nel 2017, ha suonato tutte le chitarre acustiche nell'album Quiet Storms dei Galahad, da egli stesso coprodotto.

Discografia Solista 1993 - Skeleton in a Cupboard 1995 - The Greatest Show on the Earth Threshold 1992 – Wounded Land 1994 – Psychedelicatessen 1997 – Extinct Instinct 1998 – Clone 2001 – Hypothetical 2002 – Critical Mass 2004 – Subsurface 2007 – Dead Reckoning 2012 – March of Progress 2014 – For the Journey 2017 – Legends of the Shires 2022 – Dividing Lines Produzione Strangers on a Train - The Key Part I: The Prophecy (1990) p/e/m Threshold – Wounded Land (1993) p/e/m Pendragon – The Window of Life (1993) e Strangers on a Train - The Key Part II: The Labyrinth (1993) p/e/m Ulysses - Neronia (1993) p/e/m Threshold – Psychedelicatessen (1994) p/e/m Pendragon – Utrecht... The Final Frontier (1995) p/e/m Pendragon – 'The Masquerade Overture (1996) p/e/m Threshold – Extinct Instinct (1997) p/e/m Pendragon – Utrecht... The Final Frontier (1995) p/e/m Pendragon – Live In Kraków 1996 (1997) Threshold – Clone (1998) p/e/m DragonForce - Valley of the Damned (2003) p/e/m Threshold – Decadent (1999) p/e/m Threshold – Hypothetical (2001) p/e/m Pendragon – Not of This World (2001) p/e/m Threshold – Critical Mass (2002) p/e/m Threshold – Concert in Paris (2002) p/e/m Threshold – Wireless: Acoustic Sessions (2003) p/e/m Threshold – Subsurface (2004) p/e/m DragonForce - Sonic Firestorm (2004) p/e/m Threshold – Replica (2004) p/e/m Threshold – Critical Energy (2004) p/e/m Pendragon – Believe (2005) p/e/m DragonForce - Inhuman Rampage (2006) p/e/m Threshold – Surface to Stage (2006) p/e/m Edenbridge – The Grand Design (2006) e/m/g Threshold – Dead Reckoning (2007) p/e/m Threshold – The Ravages of Time (2007) p/e/m Edenbridge – MyEarthDream (2008) e/m/g Trigger the Bloodshed - Purgation (2008) m DragonForce -Ultra Beatdown (2008) p/e/m Pendragon – Pure (2008) p/e/m Clive Nolan – She (2008) e/m Trigger the Bloodshed - The Great Depression (2009) m Threshold – Paradox: The Singles Collection (2009) p/e/m Pendragon – Concerto Maximo (2009) p/e/m Edenbridge – Solitaire (2010) e/m Yes – In the Present - Live from Lyon (2011) e/m Pendragon – Passion (2011) DragonForce - The Power Within (2012) p/e/m Clive Nolan – Alchemy (2012) e/m Threshold – March of Progress (2012) p/e/m Edenbridge – The Bonding (2013) e/m Clive Nolan – Alchemy DVD Live (2013) e/m NightMare World - In The Fullness Of Time (2015) p/e/m Threshold - Legends of The Shires (2017) p/e/m

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