George Retseck is a Philadelphia-based technical illustrator with nearly 40 years of experience. He works with magazines such as Scientific American, Popular Mechanics, The Scientist, Bicycle Quarterly, as well as companies in the science, medicine and technology fields.
He works in a variety of styles, but I especially enjoy the line quality and attention to detail in his retro pen-and-ink style. It almost makes me want to dig out my old, stubborn, finicky technical fountain pens.