A chip expert who worked for Apple for nine years has left the company to join rival Samsung, Business Korea reports.

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Kim Woo-Pyeong, according to the report, worked for Apple since 2014 after working for Texas Instruments and Qualcomm in prior years. The report is vague on what Kim’s responsibilities were at Apple, only saying he was a semiconductor expert.

Apple uses a wide range of chips in its devices, from ultrawideband chip technology to the processors that power all of its devices and a custom-made 5G modem that is reportedly in the works.

At Samsung, Kim will be the company’s director for a new packaging solution center. In the last couple of years, Samsung has upped its involvement in the semiconductor space amid increased competition from TSMC, Apple, and others. Samsung announced last month that it had started production of 3nm chips using a new transistor architecture.

Competition between Apple and Samsung remains fierce, with both companies continuing to compete for customers in smartphones, smartwatches, and accessories such as the AirPods and Galaxy Buds. Business Korea calls Samsung’s latest hire from Apple “somewhat unusual” given the cooperative yet competitive relationship between the two companies. Despite their rivalry, Samsung and Apple work together, most notably for OLED displays.

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