David Chambers is a concept and visual development artist, based in British Columbia, who works primarily in the gaming industry.
His website home page acts as a portfolio slideshow, but you can also drill down into his portfolio, which is arranged by subject matter. I found his approach to environments of particular interest for the way he handles realistic (in terms of possible in the real world) industrial environments and complex street scenes.
Much of the character work in his portfolio is from Company of Heroes 2. You will also find vehicles and various other objects, along with designs for mech, for which Chambers has a separate dedicated blog, MechCreation, in addition to his regular, more general blog. There is also a link to “Archive”, which is a mixed Flickr set.