If you need to contact either of the site administrators, the best way to do so would be to drop a comment on our site profile. Of course, if you'd prefer to go to someone directly (or just wanna know who's behind this mess), you can find their information below.
mariteaux is the official maintainer of IceQuake and writes all the guides and site text, including the text in the VDU@IceQuake archive. His main Neocities site can be found here.
yoshi295295 came up with IceQuake in August 2018 and hosts the patches, benchmarks, and game installs on his communal FTP server, Conglom-O. His main Neocities site can be found here.