Senior Underwriter US Casualty

Job Title: Senior Underwriter – US Casualty

Entity: Rokstone Underwriting

Department: Casualty

Location: London

Who We Are

Rokstone, part of the Aventum Group, is an established international underwriting MGA and approved Lloyd’s of London coverholder, where we also hold a Lloyd’s Box. With innovation at our core, we go beyond the ordinary to offer brokers specialised (re)insurance solutions. Within Rokstone, we house specialist MGAs such as Novus, iSure and iFarm, each contributing to our commitment to redefining industry standards.

At the heart of Aventum are our people. Working together in dynamic, service-focused teams, we prioritise our customers in everything we do. Collaboration fuels our success, courage drives our innovation, and continuous improvement keeps us ahead in a rapidly evolving industry. Our shared commitment is to revolutionise insurance for the better, one day at a time.

We also believe that investing in our people is investing in our future. By empowering people across the Group to develop their careers, advance within the Group, and embrace new challenges, we build an environment where growth and learning never stop.

Our competitive benefits package, offered via a flexible benefits platform, reflects this. Beyond core benefits, employees can tailor their benefits to meet their individual needs, supporting their unique goals and ambitions.

Role Summary

We are looking for a Senior Underwriter to join our dynamic and market-leading US Casualty team. This is more than a standard role; it’s an opportunity to be a critical member of a collaborative team that empowers you to challenge convention and drive new initiatives. We need a professional who thrives on combining strong technical skills with commercial initiative and a genuine passion for critical thinking. You will hold significant underwriting responsibility within our complex book, playing an instrumental role in its profitable growth by challenging assumptions and influencing our strategy with fresh ideas. Your established broker network and analytical mindset will be key to executing our goals and unlocking new opportunities in the US market

Role Accountabilities

• Underwriting Excellence: Underwrite and price complex US Casualty risks across a number of classes that include construction, transportation, manufacturing, and auto. You\’ll take ownership of the underwriting process from submission to binding, ensuring compliance with our guidelines and risk appetite.
• Business Development: Actively manage and cultivate a broad network of US brokers. You will be expected to leverage your established reputation and relationships to generate, develop, and secure new business opportunities that align with our strategic goals.
• Technical Leadership: Serve as a subject matter expert on policy wordings, pricing methodologies, and emerging market trends. You\’ll critically analyse and interpret coverage, providing insightful solutions for our clients and brokers.
• Portfolio Analysis: Work closely with our data science and actuarial teams to analyse portfolio performance. You will use data, AI, and other analytical tools to identify trends, develop new insights, and refine our underwriting strategy to optimise profitability.
• Innovation & Strategy: Drive new ideas and challenge the status quo by questioning assumptions, thinking critically and independently, and contributing to the development of new products and underwriting tools that give us a competitive edge.

Role Requirements

• A strong academic background, preferably as a graduate with a degree in an analytical, business, finance, or related discipline.
• A proven track record as an underwriter or broker in the US or International Casualty market
• Deep technical knowledge of US Casualty wordings, liability classes, and the legal and regulatory environment.
• Strong understanding of actuarial and pricing concepts, including loss development, rate adequacy, and exposure analysis.
• A robust and active network of US wholesale and retail brokers
• An acumen for structured risk solutions and emerging business lines is highly desirable.
• This role requires regular travel to the US to meet with brokers and clients.

Skills and Abilities

• Analytical & Data-Driven: A highly analytical mindset with the ability to interpret complex data, assess risk quantitatively and qualitatively, and make data-informed and experience-based decisions.
• Initiative & Leadership: A natural leader who acts on initiative, sees challenges as opportunities, and consistently operates at a level beyond their market peers.
• Communication & Collaboration: The ability to articulate complex ideas clearly and build rapport with internal and external stakeholders. You have a \”roll up your sleeves\” mentality and are passionate about collaborating with a high-performing team.
• Intellectual Curiosity: You are intellectually curious, constantly questioning your own assumptions to deepen your understanding and find better ways of working.
• IT Proficiency: Strong proficiency with IT systems, particularly Excel, is required. Experience with data analysis tools is highly desirable.

Management Duties

• No

We are an equal opportunity employer, and we are proud to share that 93% of our employees say they can be themselves at work. We aim to hire our industry\’s finest people because the best people drive the best outcomes. And we forever challenge the status quo because we know there are always ways to improve things. Because together, we\’re limitless.

We value applicants from all backgrounds and foster a culture of inclusivity. We understand the need for flexibility, so work in a hybrid model. Please let us know if you require any reasonable adjustments during the recruitment process.

FCA Conduct Rules

Under the Senior Managers and Certification Regime the FCA and Aventum expect that:

• You must act with integrity.
• You must act with due skill, care and diligence.
• You must be open and cooperative with the FCA, the PRA and other regulators.
• You must pay due regard to customers\’ interests and treat them fairly.
• You must observe proper standards of market conduct.
• You must act to deliver good outcomes for retail customers.

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