By MARIA LAMAGNA Published: June 30, 2017 4:55 p.m. ET

Andrew Wittman has been in some situations that would make pretty much anyone sweat.

He’s a Marine veteran, a former police officer and federal agent who has provided security for high-profile individuals including former Secretary of State and presidential candidate Hillary Clinton, King Abdullah of Jordan and Israel’s Prime Minister Benjamin Netanyahu. He’s also a personal trainer, holds a Ph.D. in theological studies and is a father of three teenagers.

Now, he’s taking on stress and danger on a different battlefield: the modern workplace.

He’s a speaker and consultant and teaches organizations how to be “warrior tough” at work, after starting a mental-toughness coaching company in 2013.

“All during the time I was in the Marines, a police officer and a federal agent, I was obsessed with peak performance and maximizing my own potential,” he said. “It’s kind of a natural evolution from my own personal obsession to helping others.”

MarketWatch asked him about some of the stickiest situations employees and consumers find themselves in, and how to stay cool under pressure.