He is a environment artist who has experience with 3D for about 8 years. He used to work with Blizzard Entertainment and now working with Microsoft Games 343 in Kirkland.
He has his own personal blogs and galleries in few sites, showing his own work; mainly of uncanny mental objects or beautiful landscape scenes.
Blog: http://davidlesperance.blogspot.co.uk/
Gallery: http://metalman123456123.cgsociety.org/gallery/
He rely on using Vray, Zbrush, Photoshop, 3D Maya and 3D Max for his works.
This picture is one of his inspiration work for doing some study with his programs:

His inspiration was Josh Jay doing a Bending Metal trick; showing audience how he bend the mental with his magic:
Josh Jay -Bending Metal Magic Trick
Last year, he was interviewed with cgchannel.com about his career as well as revealing that he will be teaching students in limited time from December 5th – December 19th.
Interview: http://www.cgchannel.com/2011/11/qa-david-lesperance-environment-sculptor/
The set date, learning from David Leserpance: http://www.pixologic.com/blog/2011/10/environment-sculpting-with-david-lesperance/