Greg Fidelman
Greg Fidelman is an American record mixer, engineer and record producer. He is a frequent collaborator of producer Rick Rubin, and has worked with many bands in various genres, including Metallica, Black Sabbath, Slipknot, High on Fire, Red Hot Chili Peppers, Bush, Audioslave, Marilyn Manson, Slayer, and System of a Down, but has also worked on albums by U2, Johnny Cash, Neil Diamond and others.
Before going into music engineering, he was the former lead guitarist in the rock band Rhino Bucket, being credited by the name Greg Fields.
Notable album appearances
| Date | Album | Artist | Position | Ref |
| 2023 | 72 Seasons | Metallica | Producer/Mixer | |
| 2020 | S&M2 | Metallica | Producer/Mixer | |
| 2019 | We Are Not Your Kind | Slipknot | Producer/Engineer | |
| 2016 | Hardwired... to Self-Destruct | Metallica | Producer/Engineer/Mixer | |
| 2015 | Shadowmaker | Apocalyptica | Mixer | |
| 2014 | .5: The Gray Chapter | Slipknot | Producer | |
| 2013 | 13 | Black Sabbath | Engineer | |
| 2011 | Lulu | Metallica & Lou Reed | Producer/Engineer/Mixer | |
| 2011 | I'm with You | Red Hot Chili Peppers | Engineer/Mixer | |
| 2011 | 21 | Adele | Engineer/Mixer | |
| 2010 | Snakes for the Divine | High on Fire | Producer/Mixer | |
| 2009 | World Painted Blood | Slayer | Producer/Mixer | |
| 2009 | Music for Men | The Gossip | Engineer/Mixer | |
| 2008 | Angels Undercover | Josiah Leming | Engineer | |
| 2008 | Death Magnetic | Metallica | Engineer/Mixer | |
| 2008 | The Cross of My Calling | The Noise Conspiracy | Engineer | |
| 2007 | Spider-Man 3 | Various artists | Engineer | |
| 2007 | Golden Daze | The Wildbirds | Producer/Mixer | |
| 2007 | Don't Dance Rattlesnake | The Films | Mixer | |
| 2006 | U218: Singles | U2 | Engineer | |
| 2006 | American V: A Hundred Highways | Johnny Cash | Engineer/Mixer | |
| 2006 | Wish | Reamonn | Producer/Mixer | |
| 2005 | 12 Songs | Neil Diamond | Mixer/Engineer | |
| 2004 | Broken Valley | Life of Agony | Producer/Mixer | |
| 2004 | The Feeding | American Head Charge | Producer/Mixer/Engineer | |
| 2004 | Vol. 3: | Slipknot | Engineer/Mixer | |
| 2003 | Unearthed | Johnny Cash | Mixer | |
| 2003 | Soundtrack to the Apocalypse | Slayer | Mixer | |
| 2003 | Get Born | Jet | Engineer | |
| 2003 | Life on Other Planets | Supergrass | Mixer/Engineer | |
| 2003 | Exactly What You Think It Is | Sour | Producer/Mixer | |
| 2002 | Audioslave | Audioslave | Engineer | |
| 2001 | Golden State | Bush | Engineer | |
| 2001 | Onka's Big Moka | Toploader | Engineer | |
| 2001 | The War of Art | American Head Charge | Engineer | |
| 2000 | Holy Wood | Marilyn Manson | Engineer | |
| 2000 | Thirteen Tales From Urban Bohemia | The Dandy Warhols | Engineer | |
| 1999 | Californication | Red Hot Chili Peppers | Engineer | |
| 1998 | System of a Down | System of a Down | Engineer | |
| 1997 | Built to Last | Sick of It All | Engineer | |
| 1997 | Accident of Birth | Bruce Dickinson | Assistant Engineer |