Apple Inc. is padding its healthcare talent pool with Dr. Ricky Bloomfield.

Bloomfield will be on Apples health team, and he is leaving his position as the director of mobile technology and strategy at Duke University Health System, Apple says. Bloomfields colleague at Duke announced the news on Twitter this week. Bloomfield declined to comment. Apple also is being close-mouthed about his new title and responsibilities.

At Duke, Bloomfield implemented mobile technology across the healthcare system. He was also a hospital medicine specialist and pediatric hospital medicine specialist at Duke, according to Linkedin. Bloomfield also brings to Apple his expertise from when he founded mobile app company G-Whizz!, which pulled data from multiples apps, such as Facebook, Gmail and ESPN, into one place. The app has 12 million downloads.

Apples health initiatives includes the technology providers HealthKit and Health app. Apples Health app comes pre-loaded on iPhones, which is 42.8% (the majority) of all U.S. smartphone subscribers, according to web and mobile measurement firm comScore Inc. as of September 2016. The Health app allows consumers to look at their data from multiple health apps in one place. Developers can integrate the HealthKit API into their apps, so data from its app can feed information to the Apple Health app, with the users permission. For example, a consumer can tell her meal-tracking app to send her calorie consumption to the Health app, so she can look at that information next to her exercise data.

58% of healthcare publishers use an application program interface (API), and Apples HealthKit is the most popular API, according to a recent study mHealth App Developer Economics 2016 conducted by health research group Research 2 Guidance, which surveyed 2,600 global health organizations that have developed at least one health app.

Bloomfield is Apples second big healthcare hire in recent months. In September Apple hired Dr. Mike Evans, a staff physician at St. Michaels Hospital in Toronto and an associate professor of family and community medicine at the University of Toronto.

He is recognized as an expert in digital health messaging to the public. His YouTube Med School for the Public channel has 60,000 subscribers and the videos have more than 13 million views.