Some of the studios I worked for + their projects:
Fifth Season AS - web browser game AD2460 - background and planetary art
Positech games - planetary art for Gratuitous Space Battles 2
Ironbelly Studios - several projects, mostly space / scenery - scifi background concept / illustration art
I often do commissions and provide non-exclusive rights for my art to other artists for their book / music covers, video game use or advertisment purposes.
Unfortunately, I don't take commissions from within European Union.