As far as I know, all the Sunn O))) Presents are Greg and Stephen with a varied selection of collaborators, this one's as follows:
Artwork By [Cover Art] - Justin Bartlett
Bass [Electric Bass Guitar & Triple Stack] - The Lord [i.e. Greg Anderson]
Edited By, Mixed By, Guitar [Guitar, Sunn & Ampeg] - Oren Ambarchi
Guitar [Travis Bean, Twin Reverg & Model T] - SOMA [ie Stephen O'malley]
Vocals [Delay Voice], Drums [Drumkit] - Sin-Nanna
Vocals [Hering] - Attila Csihar
Check discogs for the relevant info on the rest of the series.