One Underwriting's Company History


One Underwriting was formed in 1975 by Geoff Freeman and John McMurrick. Operations began in a single office, in the heart of the Melbourne Central Business District.

One Underwriting's relationships with world-class insurance markets and insurers have grown from strength to strength. This has enabled delivery of international securities directly to the regional Australian market.

Prior to Aon's acquisition of One Underwriting in 2006, the firm had grown to be recognised as one of Australia's largest privately owned insurance broking companies.

Find out more about Aon


Today, One Underwriting operates solely as a wholesaler of insurance facilities, delivering only to the retail broking market. One Underwriting service their entire portfolio of 450 nationwide insurance brokers and their clients from their head office locations in Melbourne, Sydney and Brisbane.

The decision to retain the One Underwriting brand has assisted the company with maintaining its operational independence. One Underwriting ensures that any business placed through them by their network of retail insurance brokers cannot, and will not, be pursued by Aon.


One Underwriting is committed to developing long-standing and reliable business relationships with their insurance broker network. Three core values underpin the One Underwriting tradition: trust, integrity and innovation.

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To learn more about One Underwriting, please contact the Key Business Development Manager in your area.