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Jack Dorsey resigns; CTO Parag Agrawal is new Twitter chief executive

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Deep Nishar joins General Catalyst

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Zynga hires Matt Wolf as VP of blockchain gaming

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Platform9 appoints Bhaskar Gorti as CEO

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The University of Texas MD Anderson Cancer Center gets its first chief data officer

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IBM elects Al Zollar to board

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HPE names Fidelma Russo as chief technology officer

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WalkMe appoints Wayne McCulloch as chief customer officer

Tinder CEO Jim Lanzone to join Yahoo as chief executive