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Underwriter - Casualty Treaty

Ki

London, England, United Kingdom Hybrid permanent

Posted: January 14, 2026

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Quick Summary

Underwriter - Casualty Treaty

Job Description

Who are we?đź‘‹

Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballers’ legs. 

Ki’s mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days. 

Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years. 

Ki’s teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons.

Where you come in?

You'll lead the Casualty Treaty book for Ki, responsbile for adhering to our agreed business plan and underwriting performance. Working with the Divisional Head, you'll take primary responsiblity for the Casualty Treaty portfolio at Ki. You'll work closelty with the actuarial team, leveraging traditional and machine learning approaches to support technical pricing for treaties. You'll be supported by the Portfolio Management team, to define and optimise annual plan strategy, reflective of market conditions. Alongside the Divisional Head, set underwriting appetite, and take steps to ensure Ki’s portfolio is in line with said appetite to maintain a profitable portfolio.

What you will be doing: 🖋️

• Work alongside the Divisional Head to define, develop, and deliver the underwriting strategy for Casualty Treaty ensuring that the annual business plan is written profitability.
• Bring an understanding of the Lloyd’s and global markets, identifying potential for new opportunity areas by both product and geography.
• Continually monitor risk appetite to drive the team’s revenue strategy, maintaining profitability targets in conjunction with the Portfolio Management and Actuarial functions.
• Understanding rating adequacy of Casualty Treaty, working with the Portfolio Management and Actuarial functions to ensure a balanced and profitable portfolio is built and managed.
• Act as an underwriting subject matter expert and feed into the development of Ki’s tech products to continually develop tooling in line with Ki’s appetite.
• Leverage existing relationships and continue to build new relationships for Ki to access distribution channels.
• Communicate Ki’s underwriting appetite and evolving strategy to external stakeholders, notably brokers and clients.
• Analyse and underwrite risks written following nominated leads to ensure wordings are appropriate and risks remain within appetite.
• Based on existing class knowledge, work with the Divisional Head and Portfolio Management to constantly update underwriting strategies to reflect the market conditions.
• Collaborate with the Actuarial and Portfolio Management functions to:
• Focus on areas of the portfolio and review based on historical performance and feedback from clients and brokers.
• Optimise the commercial lens and strategy by giving updates from the market, distribution partners and competitors


Requirements:
• Track record of success in the development and execution of commercially viable strategies, with high standards of delivery in a timely, cost-effective way.
• Experience of working in the London and Lloyd’s Casualty Reinsurance markets.
• Excellent negotiation, communication, and presentation skills to drive revenue and business development opportunities across Ki’s distribution network.
• Strong organisational credentials to help drive a dynamic team to deliver the revenue strategy in a coherent manner.
• Capable of managing, developing, and profiting from new and existing relationships.
• A commercial understanding of underwriting. Able to assimilate into strategic discussions around the structuring and management of portfolios.
• Ability to manage their own workload and self-motivate to execute targets successfully.
• Ideally knowledge across more than one class of Casualty / Specialty business


Benefits:
You’ll get a highly competitive remuneration and benefits package. This is kept under constant review to make sure it stays relevant. We understand the power of saying thank you and take time to acknowledge and reward extraordinary effort by teams or individuals.

What to expect during the recruitment process:

1) Initial recruiter screening call

2) Interview with hiring manager

3) Technical Interview (this may vary depending on the role)

4) Values Interview

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