https://www.cnbc.com/2018/02/04/castlight-health-ceo-bezos-will-learn-health-care-is-a-tough-business.html >Castlight Health works with dozens of large employers, including Amazon, to help workers navigate their health benefits with its online tools. >So it would make sense that its CEO John Doyle would be a key resource for Amazon and its partners, Berkshire Hathaway and JPMorgan Chase, in their plan to curb workers' escalating health care costs, in part with new technology.