Adam Selipsky, CEO of Amazon Web Services, will resign on June 3rd after an 18-year tenure. Matt Garman, AWS' current sales and marketing leader, will replace Selipsky as the new CEO of AWS. Selipsky had been at AWS since the early days and helped turn it into a major enterprise. AWS performed well in its last quarter and investors will want Garman to continue driving growth. The leadership transition comes as AWS approaches $100 billion in annual revenue.