According to his Twitter account, Mark Molnar lives in the UK, but we absolutely appreciate that he has a Hungarian family name (we have a Molnár too!). Anyway, Mark Molnar does concept art really professionally. According to his portfolio, he worked for major film and game companies, like LucasFilm, Weta, Crystal Dynamics.
Just a sample of his work:
Hellblade “The Canyon of Hands”
Star Wars “Trench Run”
Warhammer 40k – Only War, “Headquarters”