• Home
  • Latest
  • Coins2Day 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
Australia
Asia

Australia’s second-largest telco loses its CEO after a network outage that hit almost 40% of the country’s population

By
Lionel Lim
Lionel Lim
Asia Reporter
Down Arrow Button Icon
By
Lionel Lim
Lionel Lim
Asia Reporter
Down Arrow Button Icon
November 20, 2023, 2:33 AM ET
Illuminated signs displayed in the window of an outlet for the Australian communications company Optus.
Illuminated signs displayed in the window of an outlet for the Australian communications company Optus.David Gray—AFP via Getty Images

Millions of Australians woke up on the morning of Nov. 8 to find that their phones were completely useless. An unplanned outage from nationwide provider Optus hit customers in the middle of their morning commute and extended throughout the entire day, throwing several systems into chaos. Businesses couldn’t process electronic payments, hospitals couldn’t take phone calls, and public transport was delayed. The downtime affected some 10 million Australians, equal to about 40% of the country’s population.

Recommended Video

Now, the outage has claimed its first head, as Optus CEO Kelly Bayer Rosmarin resigned Monday following a critical report from the Australian Senate. Her resignation puts an end to an eventful tenure as the head of Australia’s second largest telecoms company, owned by Singapore Telecommunications, also known as Singtel.

Bayer Rosmarin said in a statement released by Singtel on Monday that she has had time for “personal reflection” and her resignation is in the “best interest of Optus moving forward”.

In that statement, Singtel said Bayer Rosmarin led Optus during a “challenging period,” and that Optus delivered improved financial performance and market share gains under her tenure.

Bayer Rosmarin was appointed CEO in April 2020 and the Nov. 8 outage was the second national scandal under her leadership. She had spent a year as deputy CEO and was previously at the Commonwealth Bank of Australia.

Last September, hackers breached Optus, exposing personal customer details in what some described as the worst data breach in the company’s history. The company admitted that addresses, drivers’ licenses, and passport numbers may have been revealed in the data breach. In April, 100,000 people joined a class-action lawsuit against Optus regarding the hack.

Then, on Nov. 8, an outage left millions of Optus mobile and internet customers without connection. The nationwide outage started at around 4:00am local time; connectivity to the majority of the network was only restored around 6:00pm late that day.

A Senate inquiry on Friday revealed that Optus had not planned for a network-wide outage and therefore had no backup in place. Bayer Rosmarin also said on Friday that Optus had received customer claims of about $282,000. The company believes a software upgrade at its corporate parent, Singtel, caused the outage.

Singtel said it understood the need for Optus “to regain customer trust and confidence,” Group CEO Yuen Kuan Moon said in a statement on Monday. “We view the events in recent weeks very seriously. We fully recognize the importance of Optus’ role in providing connectivity services to the community and the importance of network resiliency and security,” he continued.

Singtel is creating a new role of chief operating officer at Optus, which will be filled by the company’s former business managing director, Peter Kaliaropoulos.

Optus chief financial officer Michael Venter will take over at the Australian telco’s interim CEO while the company conducts a global search for a new head. Like his erstwhile boss, Venter is also from the Commonwealth Bank of Australia prior to joining Optus in March 2021.

Join us at the Coins2Day Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Author
By Lionel LimAsia Reporter
LinkedIn icon

Lionel Lim is a Singapore-based reporter covering the Asia-Pacific region.

See full bioRight Arrow Button Icon

Latest in

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Coins2Day Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Coins2Day 500
  • Global 500
  • Coins2Day 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Coins2Day Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Coins2Day Brand Studio
  • Coins2Day Analytics
  • Coins2Day Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Coins2Day
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

© 2026 Coins2Day Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Coins2Day Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.


Most Popular

placeholder alt text
North America
'I meant what I said in Davos': Carney says he really is planning a Canada split with the U.S. along with 12 new trade deals
By Rob Gillies and The Associated PressJanuary 28, 2026
2 days ago
placeholder alt text
Politics
The American taxpayer spent nearly half a billion dollars deploying federal troops to U.S. cities in 2025, CBO finds
By Nick LichtenbergJanuary 28, 2026
1 day ago
placeholder alt text
C-Suite
Coins2Day 500 CEOs are no longer giving employees an A for effort. Now they want proof of impact
By Claire ZillmanJanuary 28, 2026
2 days ago
placeholder alt text
C-Suite
Jeff Bezos capped his Amazon salary at $80,000: ‘How could I possibly need more incentive?’
By Sydney LakeJanuary 28, 2026
2 days ago
placeholder alt text
Investing
Jerome Powell got a direct question about the U.S. ‘losing credibility’ and the soaring price of gold and silver. He punted
By Eva RoytburgJanuary 29, 2026
16 hours ago
placeholder alt text
Personal Finance
Current price of silver as of Thursday, January 29, 2026
By Joseph HostetlerJanuary 29, 2026
16 hours ago

Latest in

EnvironmentInsurance
Asia is one of the world’s least insured places, even as it’s battered by climate change and natural disasters
By Angelica AngJanuary 29, 2026
2 hours ago
Big TechApple
Apple’s blowout Q1 results were a reminder of what makes the company so impressive—and why it’s floundering in AI
By Alexei OreskovicJanuary 29, 2026
4 hours ago
C-SuiteCoins2Day 500: Titans and Disruptors of Industry
Pfizer CEO says he used ‘emotional blackmail’ to get employees to achieve impossible goals during COVID-19
By Eva RoytburgJanuary 29, 2026
6 hours ago
kermit
Arts & EntertainmentTV
The saga of the billion-dollar sock: The Muppets’ 50th birthday marks a long and profitable run
By Jared Bahir Browsh and The ConversationJanuary 29, 2026
8 hours ago
InvestingFinance
Remove Tesla’s non-repeatable profits, and the stock has never been more expensive—now boasting a ‘core’ PE of 632
By Shawn TullyJanuary 29, 2026
8 hours ago
ICE
CybersecurityMilitary
Only 4 democracies have created paramilitary police squads since 1960—if you include ICE
By Erica De Bruin and The ConversationJanuary 29, 2026
8 hours ago