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Experts in

Power & Energy

Our Energy portfolio delivers non-proportional, technically led underwriting solutions designed to support the shift towards a renewable future. Built for brokers navigating one of the most complex markets, we combine experience with a consistent, client focused approach.  

Overview

In a notoriously difficult arena, Rokstone brings clarity and technical strength. Our team is recognised as a leading quoting market for renewable and transitional energy risks, offering reliable support to brokers and delivering consistent returns for carriers. Backed by years of hands-on expertise, we are here to help shape the energy future. 

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Regions covered

Worldwide

Product

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Energy

Overview

We focus on complex energy risks across both renewable and conventional power, with a preference for non-proportional primary and first excess programme structures.  

Risk appetite

Specialist expertise for a sector in transition, with coverage options including:

  • Renewable energy
  • Electricity transmission and distribution assets
  • Conventional power generation
  • Non proportional primary and first excess programme structures preferred
  • Midstream energy

Coverage and limits

  • All risks of physical loss or damage including machinery breakdown, business interruption and machinery loss of profits
  • Bespoke policy wordings available as lead insurer, tailored to the client’s business model and needs
  • Line size up to USD 20m
  • Can provide bespoke policy wordings as leading

Operational Bioenergy

Overview

A specialist solution built for the unique challenges of the bioenergy sector, we underwrite a global portfolio, offering protection against the complex operational risks these assets face. With a focus on the UK, Europe and North America, we help clients manage evolving exposures while supporting the transition to a low carbon future.  

Risk Appetite

Our appetite spans a wide range of operational bioenergy assets across key global markets, including: 

  • Waste-to-Energy
  • Biomass
  • Anaerobic digestion with reciprocating engines
  • Battery Energy Storage Systems
  • Hydrogen Transition
  • Renewable natural gas
  • Biofuels
  • All risks of Physical Loss or Damage including Machinery Breakdown and consequential Business Interruption

Coverage and Limits

  • Line size up to USD 27.5m per project
  • A+ rated capacity
  • Bespoke lead capabilities

Product manager

Jack O'Sullivan

Senior Underwriter Biomass

With over 12 years of experience in Renewable Energy Insurance, Jack O’Sullivan has built consistently profitable portfolios across multiple organisations. Over the past five years, he has specialised in the Waste-to-Energy sector, earning a strong reputation as a technical and reliable underwriter, both as lead and follow. His disciplined approach and deep broker relationships—spanning wholesale, retail, and reinsurance—have positioned him as a key market presence in the global renewable energy space.

Email Jack +44 (0) 7514 315 400

Portfolio manager

Ian Green

Head of Power and Energy

Ian is a highly experienced and respected underwriter in the London and global market. He has a strong track record of leading accounts at major market players and adapting underwriting plans to carrier capabilities and market conditions. With leadership roles at AIG London, ACE Global Markets, Hiscox, and AEGIS Syndicate, Ian has demonstrated expertise in the Power/Energy sector, underwriting substantial accounts and earning a reputation as the go-to expert for non-proportional lead quotes. His extensive industry knowledge and strategic insights make him a valuable asset in delivering outstanding results for clients.

Email Ian +44 (0) 797 001 2369

Lloyd's box status

398

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