The hiring is the latest expansion of a growing medical devices research team at the iPad maker, according to Apple Insider.
While the typically secretive Apple isn’t confirming anything about the hire or that the company is researching medical devices, Masimo's recent product releases may give a clue as to what he’ll be working on at Apple.
The firm launched an iPhone-compatible pulse oximeter in 2012. Pulse oximetry offers users a non-invasive and accurate means of pulse measurement by monitoring oxygen saturation in the blood stream.
Apple is rumored to be developing a so-called "iWatch" that will incorporate advanced health monitoring features.