Article by Mark Jaffe and originally published on denverpost.com Keith Robertson, then a junior at Arvada’s Ralston Valley High School, had two summer job options: lifeguard or creating software for “the idea” of a new oil and gas data management company. “That sounded a lot more interesting than being a lifeguard,” said Robertson, now 24.… Read more about PetroDE talks with the Denver Post about recent traction