Mark Horstman is co-founder of Manager Tools, a management consulting and training firm. He is also co-host of the Manager Tools podcast, the number 1 business podcast in the world, with over three million downloads a month. Virtually all of the Fortune 500 are clients of Manager Tools, including Apple, General Motors, and Salesforce.com. The firm trains thousands of managers throughout the world every year.

He is also the author of The Effective Manager, a bestseller on Amazon. He is a graduate of the United States Military Academy at West Point. Following his service, he worked in sales and marketing at Procter & Gamble. He lives in Pebble Beach, California.