After six years of running Blue Origin, Bob Smith announced in a company-wide email on Monday that he will be "stepping aside" as chief executive of the space company founded by Jeff Bezos.

"It has been my privilege to be part of this great team, and I am confident that Blue Origin's greatest achievements are still ahead of us," Smith wrote in an email. "We've rapidly scaled this company from its prototyping and research roots to a large, prominent space business."

Shortly after Smith's email, a Blue Origin spokesperson said the company's new chief executive will be Dave Limp, who stepped down as Amazon's vice president of devices and services last month.

"Dave is a proven innovator with a customer-first mindset," the spokesperson said. "He has extensive experience in the high-tech industry and growing highly complex organizations, including leading Amazon’s Kuiper, Kindle, Alexa, Zoox, Fire TV, and many other businesses."

Limp will join Blue Origin in December and become chief executive of the company at that time.