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Personalis: John West

Personalis CEO John West will retire from his position at the end of the calendar year, the company said. West has worked in the DNA sequencing field for over 40 years and cofounded Personalis with four Stanford professors in 2011. Prior to that, he was senior VP and general manager for Illumina's DNA sequencing business. He also served as CEO of Solexa until that company's acquisition by Illumina and was VP of DNA platforms at Applied Biosystems. West holds an MBA from the Wharton School of Business at the University of Pennsylvania, and an MS and BS in engineering from the Massachusetts Institute of Technology.

Effective Dec. 31, 2022, Personalis CFO Aaron Tachibana will serve as interim CEO, while Christopher Hall, the firm's senior VP and head of diagnostics, will be promoted to president. West will continue to serve as an advisor to the firm's board.

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