About us

James Potter is the chief executive officer and co-owner of Rokstone and a board director of Aventum Group.

James has over 23 years' experience within the London and global insurance markets, successfully developing and maintaining a valued network centralised on long term strategic partnerships.

He has had responsibility for establishing various trading divisions, teams and MGA's within the broking and underwriting environment, from start-ups and the restructuring of existing teams, to servicing global placements for multinational firms with global capacity providers and client networks.

James has facilitated the placing and underwriting of reinsurance and/or insurance products, schemes, and delegated authority arrangements, including online trading platforms, covering a variety of classes of business including terrorism, property, energy and casualty contractors all risks.

Ian Anson is the portfolio manager for property, power and energy at Rokstone. Ian works in the direct and facultative property division and is responsible for business production and analysis, and facultative reinsurance buying strategy and execution.

He started his career in 2013 and spent the subsequent years at Alesco, working in onshore energy and power generation specialty lines. From there he developed a specialism in heavy industrial risks and managed a team of onshore energy brokers placing international energy accounts.

If Ian wasn’t working for Rokstone, he would probably be playing golf, having earned a golf scholarship to the University of Kansas.

Alex Curme is responsible for working on projects within the financial function that will help support the group as it continues to grow. He joined the Group in February 2022, having previously spent five years as a auditor at Deloitte, specialising in all types of insurance companies, followed by three years at MGA Ensurance, where he was Head of Finance.

Prior to transitioning to the Rokstone team in May, Tony was CEO of Imperium Insurance, one of the Rokstone businesses he co-founded with David Bearman , CEO of Aventum. Imperium was the first UK company to provide its customers with a suite of agriculture products that could be bought online under its IFarm Underwriting brand. With 25 years of experience in both underwriting and Broking, Tony is leveraged to ensure Rokstone Agriculture Risk Underwriters will have products designed around the customer that are built with agility and speed, are easy to use and the distribution is supported by experienced underwriters which adds value to our customers, insurer partners and shareholders.

John McGonigle is the Chief Underwriting Officer, Rokstone Consumer. His main responsibilities include the profitable development and management of the warranty and consumer products portfolio underwritten on behalf of Novus’ capacity partners.

He has worked within the insurance industry since early 1991, mainly within the London market (both company and Lloyd’s). His focus since 1997 has been on the underwriting of warranty and associated consumer insurance products, both in the UK and on an international basis.

Outside of work he has undertaken a number of personal and team challenges for charity, including rowing the English Channel, riding the off-road London to Brighton route and climbing the three peaks.

Nadine joined Rokstone in 2022 as the Global Head of Rokstone Specialty. With over 14 years of experience in the insurance industry, Nadine brings technical expertise across a diverse range of disciplines, including Portfolio Management, Underwriting, Risk Management and Claims.

Gavin Dollings is the Chief Underwriting Officer, Rokstone Commercial at Aventum Group, responsible for the management, performance and governance of the underwriting of the Group’s digitally traded classes of business within Rokstone.
He joined the Group in March 2022, having previously been Covea Insurance’s commercial underwriting director for five years. Before that he had also spent 10 years at Allianz heading up their casualty and construction lines, and as a management consultant for Accenture.
Outside of work, Gavin enjoys taking part in a number of sports, especially windsurfing and skiing when time and weather conditions allow. He also likes running, mountain biking, fitness classes, and travelling.