| 2024-03-24 07:59:17 | menace | Updated Sierra as organiser of Mekka & Symposium 2002: changed role to music compos |
| 2024-03-24 07:58:51 | menace | Added Sierra as organiser of Mekka & Symposium 2002 |
| 2024-02-25 15:34:25 | dipswitch | Updated Sierra as organiser of Breakpoint 2006: changed role to Music Compos, Infodesk |
| 2024-02-25 15:06:25 | dipswitch | Added Sierra as organiser of Breakpoint 2006 |
| 2024-02-25 11:16:29 | dipswitch | Updated Sierra as organiser of Breakpoint 2005: changed role to Music Compos, Infodesk |
| 2024-02-25 11:09:16 | dipswitch | Added Sierra as organiser of Breakpoint 2005 |
| 2024-02-25 11:01:12 | dipswitch | Updated Sierra as organiser of Breakpoint 2004: changed role to Music Compos, Infodesk |
| 2024-02-25 10:53:47 | dipswitch | Added Sierra as organiser of Breakpoint 2004 |
| 2022-09-11 13:00:01 | FlashyLamer | Added nick 'Tom & Jerry' |
| 2022-09-07 10:49:49 | AzzaroMWI | Removed Sierra as a member of Madwizards |
| 2022-02-13 14:26:42 | FlashyLamer | Edited nick 'Sierra': set as primary nick |
| 2022-02-12 20:30:43 | FlashyLamer | Edited nick 'Kowloon': set as primary nick |
| 2022-02-12 20:27:46 | FlashyLamer | Added link https://amp.dascene.net/detail.php?view=1529 |
| 2022-02-12 20:26:40 | FlashyLamer | Added link https://scenesat.com/act/1643 |
| 2022-02-12 20:26:20 | FlashyLamer | Added Sierra as a member of MadWizards |
| 2022-02-12 20:24:22 | FlashyLamer | Updated Sierra's membership of Superpornos: changed member to Sierra |
| 2022-02-12 20:19:36 | FlashyLamer | Added nick 'Plüschmuschi' |
| 2022-02-12 20:16:07 | FlashyLamer | Added nick 'Dan Dryer' |
| 2022-02-12 20:12:18 | FlashyLamer | Edited nick 'Clint & John': changed aliases to 'Clint and John' |
| 2022-02-12 20:12:01 | FlashyLamer | Added nick 'Clint & John' |
| 2022-02-12 20:11:54 | FlashyLamer | Added nick 'Clark Kimberly' |
| 2022-02-12 20:06:33 | FlashyLamer | Added nick 'Kowloon' |
| 2022-02-12 20:01:34 | FlashyLamer | Updated link https://web.archive.org/web/20030809014339/http://www.audioarena.de/ |
| 2022-02-12 19:53:48 | FlashyLamer | Added link https://files.scene.org/browse/music/artists/sierra/ |
| 2021-03-06 01:20:55 | dipswitch | Added Sierra as a member of Surround |
| 2021-02-13 03:43:52 | dipswitch | Removed Sierra as a member of Top Crew |
| 2021-02-13 03:42:35 | dipswitch | Added Sierra as a member of Topcrew |
| 2021-01-08 10:19:32 | vitalkanev | Added Sierra as organiser of Breakpoint 2007 |
| 2021-01-07 14:22:13 | menace | Added Sierra as organiser of Mekka & Symposium 2001 |
| 2021-01-07 13:41:04 | menace | Edited notes |
| 2021-01-07 13:38:49 | menace | Added Sierra as organiser of Mekka & Symposium 2000 |
| 2021-01-07 13:31:22 | menace | Added Sierra as organiser of Breakpoint 2003 |
| 2020-07-27 11:37:34 | vitalkanev | Added credit for Sierra on Evoke 1997 Report: Music |
| 2020-06-12 16:36:54 | gasman | Updated Sierra's membership of Top Crew: set as ex-member |
| 2020-06-12 16:36:42 | gasman | Added Sierra as a member of Top Crew |
| 2020-06-12 16:36:28 | gasman | Added nick 'Arreis' |
| 2020-04-17 09:36:51 | FlashyLamer | Added Sierra as a member of Azure |
| 2018-06-20 18:07:01 | sensenstahl | Added Sierra as a member of United Traders Of Germany |
| 2013-04-13 20:35:12 | dipswitch | Updated Sierra's membership of Advanced Rhythm Technologies: set as ex-member |
| 2013-04-13 20:03:27 | dipswitch | Removed Sierra as a member of Art |
| 2013-04-13 20:01:09 | dipswitch | Added Sierra as a member of Advanced Rhythm Technologies |
| 2013-01-05 15:31:10 | Saga_Musix | Added credit for Sierra on Event Horizon: Music (Main part) |
| 2012-07-21 08:05:35 | menace | Updated Sierra's membership of Destiny: changed group to Destiny |
| 2012-07-21 08:05:26 | menace | Added Sierra as a member of Destiny |
| 2012-07-21 08:04:40 | menace | Removed Sierra as a member of Destiny |