Andrew Whitlock hasn't hung around at Arch Insurance Australia. Nine months after arriving from Chubb, he has been promoted to head of casualty, taking charge of the specialty insurer's retail liability portfolio across Australia with immediate effect.

When Whitlock joined in January, it was as northern region casualty underwriting manager, running underwriting and broker relationships in New South Wales, the ACT and Queensland. Arch said at the time that he brought more than a decade of insurance experience across the UK and Australia. His last job at Chubb was casualty segment leader in the major accounts division, and before that he worked as a broker with Brown & Brown in London.

The new role is national. From Sydney, Whitlock leads the casualty team and sets underwriting strategy for the whole of Arch's Australian retail casualty book. The portfolio writes primary and excess liability, and its core business is product-driven risk: manufacturers, wholesalers, retailers, and companies that import or export goods.

He reports to Dominic Brannigan, now managing director of the Australian business. He will also work alongside James Mecham, deputy chief underwriting officer for long-tail lines and head of general casualty at Arch Insurance International.

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Brannigan credited Whitlock with significant growth in the northern region portfolio during his short time there. "He has demonstrated the leadership, commitment and commercial focus needed to take our business forward," he said.

Mecham was more interested in the plumbing. He called the appointment a "positive step" for Arch's international casualty plans because it pulls the Australian retail team closer to the group's London Market wholesale operation. Arch Insurance International houses the group's insurance businesses in the UK, Lloyd's, Europe, Bermuda and Australia, and sits within the S&P 500-listed Arch Capital Group.

It has been a year of reshuffles in Sydney and Melbourne. In February, Brendon Terry and Jarrod O'Connor were promoted to run the northern and southern branches, and Aisling Hegarty was made head of professional indemnity. Arion Reuter joined the professional indemnity team earlier in the year, and in August Dave Ha came over from DUAL as senior executive assurance underwriter for the southern region.

Arch isn't the only insurer reworking its casualty leadership. AIG named Liam Baughan head of casualty for Australia in January, and Marsh-owned MGA Victor appointed Danial Mullin to the same title in August.

Read next: Arch Insurance Australia appoints branch managers

Whitlock inherits a market that has swung sharply in buyers' favour. Three years ago, Australian liability renewals were still going up by as much as 15%. By the first half of 2024, Marsh had them roughly flat. A year later, the liability market had tipped further towards buyers as capacity grew. EBM Insurance & Risk's latest outlook says general liability has continued to favour buyers through 2026, with local insurers often beating offshore rivals on price, deductibles and terms.

The softening is not just local. Marsh's latest Global Insurance Market Index found casualty rates fell in every region in the second quarter of 2026 except one: the US, where they rose 7%. The Pacific, which in Marsh's index is dominated by Australia, recorded a 13% fall in overall rates, the second-steepest drop of any region.

That US exception matters for a book like Arch's. Products liability for importers and exporters is exactly where American litigation risk tends to leak into Australian policies, because goods that end up on US shelves can bring US juries with them. Aon warned in February that casualty pressure was building on the back of litigation costs, noting the median US nuclear verdict had roughly doubled between 2020 and 2023. At home, law firm Kennedys has pointed to rising claims inflation and growing personal injury litigation.

Read next: Buyer-friendly insurance market won't last as casualty pressures build, Aon warns

For brokers, the question is what the London connection actually delivers. Arch's announcement didn't say whether the new structure will mean bigger lines, more excess capacity or wider appetite for Australian clients. Those placing products liability for exporters will want to find out before renewal season.

Read next: Global commercial insurance rates fall 6% in Q2, Pacific posts second-steepest regional decline