Complex sentence: Compared to many of the editors here, Mdann has only been around for 3.5 years, but in that time, he has made over 25,000 edits and has taken on a significant amount of gnome and admin-like work.
Split into simpler sentences: Compared to many of the editors here, Mdann has only been around for 3.5 years. Yet in that time, he has made over 25,000 edits and has taken on a significant amount of gnome and admin-like work.