Fortune 40 Under 40 List

The list covers five sectors including finance, technology, health, government/politics and media/entertainment

Fortune magazine said executives have moved quickly to support and empower employees while grappling with daunting challenges to the way their businesses operate

Also on the list is Voice user interface designer at Amazon Alison Atwell, 31, who is in charge of "training" Alexa, Amazon's cloud-based voice service, and teaching her new skills

The Ledger '40 Under 40' supplementary honour roll list shines a light on the pioneers building some of the world's fastest-growing businesses