Twilio announced that Microsoft’s Charlie Bell has joined the company’s board of directors.

Bell is a well-known veteran of the tech industry, having served for 23 years at Amazon. When Jeff Bezos stepped down as Amazon CEO and was replaced by AWS CEO Andy Jassy, many saw Bell as Jassy’s natural successor. Instead, he ended up leaving Amazon and was hired by Microsoft to lead the company’s new Security, Compliance, Identity, and Management Team.

Twilio is eager to tap into Bell’s expertise as it continues to grow its platform.

“Charlie is one of the most well respected and admired technologists in the world, with a historic career building AWS from the ground up for more than two decades and now running cybersecurity at the world’s largest software company, Microsoft,” said Jeff Lawson. “Charlie’s expertise in both cybersecurity and running infrastructure technology businesses at scale brings an invaluable skill set to the Twilio board. I look forward to Charlie’s contributions to Twilio as we continue to build the leading customer engagement platform serving hundreds of thousands of businesses and millions of developers each year.”

“Twilio is committed to maintaining a strong, engaged Board, and evaluates its composition on an ongoing basis to ensure our Board reflects the appropriate diversity of viewpoints, experiences and backgrounds to oversee the Company’s evolving business needs,” said Jeff Epstein, Lead Independent Director of the Board. “Charlie’s experience as a leading expert on cybersecurity as well as his impressive track record of elevating the execution and operations of businesses he’s supported, make him the ideal addition to the Board as we continue to bolster the depth of our security expertise and focus on realizing Twilio’s growth potential.”

“I have had the privilege of working with companies that have redefined the tech sector as we know it,” said Charlie Bell. “I know bold innovation is possible, and as companies of all sizes look for smarter, better and more effective solutions to reach their customers, Twilio is building the infrastructure to meet their needs. I look forward to working with the rest of the Twilio Board and its management team to create the leading customer engagement platform in a world that’s more engaged than ever before.”