Job Title: Assistant Underwriter – US Casualty (Umbrella & Excess)Location: London (Hybrid Working Available)Salary: Competitive + BenefitsJoin a Growing Team in a High-Impact RoleOn behalf of a dynamic and rapidly growing specialty insurer, we are seeking an Assistant Underwriter to join the US Casualty team, supporting a high-profile Group Head and Senior Underwriter as they build out a new and exciting portfolio. This is a rare opportunity to be part of a developing book from the ground up, with meaningful exposure to strategy, pricing, and underwriting processes.The Opportunity This newly launched US Casualty Umbrella and Excess and is expected to grow significantly. The role offers you the chance to work in a leader-follow model, where the team prices and rates accounts but currently operates without a dedicated claims team—relying instead on third-party insights.You'll support underwriting across a diverse range of sectors, including:

Product Liability
Rail
Construction
Premises & Operations

As part of a close-knit and collaborative structure reporting into the Operations team, you’ll work alongside both the Group Head of US Casualty and a Senior Underwriter to ensure smooth operational execution while gaining exposure to high-level decision-making.Key Responsibilities

Support underwriting tasks including account pricing, rating, and documentation
Liaise with brokers and internal stakeholders to ensure timely processing of quotes and binders
Maintain underwriting files and assist with data analysis/reporting
Contribute to the smooth running of day-to-day operations
Assist in the development and refinement of underwriting guidelines as the book matures

About You

Previous experience in a similar Assistant Underwriter or Underwriting Analyst role (US Casualty preferred)
Strong organizational and communication skills
Analytical mindset with attention to detail
Eagerness to be part of a developing team and learn from senior underwriting leaders
Familiarity with casualty classes of business (especially excess & umbrella) is highly advantageous

Why Apply?

Be part of a growing, high-profile book at an early stage
Mentorship from senior market professionals
Strong progression opportunities as the book and team expand
Collaborative, entrepreneurial culture

Apply now to be considered for this unique Assistant Underwriter opportunity in US Casualty, and take the next step in your insurance career.

Assistant Underwriter - US Casualty

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