A former CIA officer, Navy SEAL, and others discuss how their secret jobs worked

Gary Stevenson is the author of "The Trading Game." He spent his early 20s trading trillions of dollars for Citibank in London and Tokyo. He talks to Business Insider about office culture in Canary Wharf, London, the mindset of profitable bankers, their daily routine, the bonuses, and what leaving the job is like. Now, Stevenson is a published author and teaches economics through his YouTube channel, Garyseconomics.

Shawn Ryan served as a Navy SEAL for almost six years. He discusses his time in Basic Underwater Demolition/SEAL training, or BUD/S, and how he was recruited. After seeing combat in Afghanistan, Iraq, and Haiti, Ryan left the Navy and worked as a contractor for the CIA. Today, he runs a YouTube channel and a podcast, "The Shawn Ryan Show."