Nine months after Swiss insurer Ace announced its $US28.3 billion ($39.2 billion) acquisition of US-based Chubb, the two companies are now officially one.

Last week they began operating under one management structure.

Australia Country President John French says it is “an important milestone” after spending the first quarter of this year finalising staff roles and the new business structure.

“The wealth of talent that exists in our integrated organisation is outstanding,” he said.

The new structure features dedicated global broker distribution teams and specialist independent broker distribution teams in Sydney, Melbourne, Brisbane, Perth and Adelaide.

“We are looking forward to working with brokers to meet the needs of our clients via a far broader product range than was previously offered by each legacy organisation,” Mr French said.

He says the group is also rolling out new branding, planning ahead for product announcements this year and continuing integration activities.