Parent Singapore Telecommunications (STEL.SI) announced the resignation of Optus CEO Kelly Bayer Rosmarin days after a network-wide outage left nearly half of Australia's 26 million people without phone or internet for 12 hours. Appointed in April 2020, Rosmarin headed Optus through two national scandals that have tarnished the reputation of the telco giant. A massive data hack last year exposed the personal data of 10 million Australians and triggered a class action lawsuit and multiple investigations from regulators. Optus executives told the parliamentary hearing on Friday the telco provider had not foreseen a network-wide outage and so had no backup plan in place. (This story has been corrected to change date of Optus network outage to earlier this month, not last week, in paragraph 7)Reporting by Himanshi Akhand in Bengaluru, and Lewis Jackson and Byron Kaye in Sydney; Editing by Lisa Shumaker and Stephen CoatesOur Standards: The Thomson Reuters Trust Principles.

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Persons: Kelly Bayer, Michael Venter, Singtel, Rosmarin, ”, telco, Yuen Kuan, Peter Kaliaropoulos, Himanshi, Lewis Jackson, Byron Kaye, Lisa Shumaker, Stephen Coates Organizations: telco Optus, Parent Singapore Telecommunications, Optus, Triple, Thomson Locations: Optus, Bengaluru, Sydney