M&A Junior Analyst in London

We are seeking an Underwriting Administrator to join our Casualty Treaty team, providing high-quality administrative and operational support to underwriters. This role is a vital part of ensuring the underwriting function runs smoothly, accurately, and in line with internal processes and regulatory requirements. This is a dedicated administration role, well suited to someone who enjoys structured, process-driven work, takes pride in accuracy, and wants to build a strong and stable career in insurance operations and underwriting support, rather than moving into an underwriting role itself.

Key Responsibilities

• Entering and maintaining risk and policy data accurately across underwriting systems
• Producing, maintaining, and updating underwriting files in line with guidelines and workflows
• Supporting underwriting teams by ensuring documentation and records are complete and up to date
• Monitoring and maintaining operational, compliance, and financial controls (e.g. SOX, Aged Debt reports)
• Assisting with income monitoring, contract signings, and chasing late payments where required
• Ensuring underwriting systems and established processes are consistently followed
• Providing a professional, responsive administrative service to multiple stakeholders

Qualifications Skills & Experience

• This role would suit candidates with strong administrative, coordination, or insurance support experience.
• Strong attention to detail and a structured approach to work
• Good working knowledge of Microsoft Office, particularly Excel and Word
• Ability to manage deadlines, prioritise tasks, and work methodically
• Clear communication skills, both written and verbal
• Professional, reliable, and customer-focused attitude
• Experience in insurance administration or underwriting support
• Familiarity with underwriting or policy administration systems
• Numeric and analytical confidence

This role is designed as a long-term underwriting administration position, offering stability, consistency, and the opportunity to deepen expertise in insurance processes, data accuracy, and operational controls. Support may be provided for relevant professional qualifications, where appropriate, to strengthen administrative and technical knowledge.

Job Spec

Mosaic Transactional Liability team in London is looking for an analyst to join the team to work on all M&A insurance placements. This role provides an exciting opportunity to learn about transactional liability insurance in the fast-paced M&A environment, develop analytical and commercial skills, gain a deep understanding of corporate transactions, and work alongside experienced underwriters on market-leading deals.

Key Responsibilities

• Managing workflow on deal opportunities that contemplate use of Warranty and Indemnity Insurance, Tax Insurance and Contingent Insurance, including review of NDAs, management of core inbox for submissions and working with internal teams and 3rd parties to ensure data collection.
• Analysing mergers and acquisition-related documents, including reviewing financial statements, business background information and purchase agreements, and researching issues related to M&A transactions
• Assisting in managing the underwriting diligence process.
• Coordinating and communicating with insurance brokers, lawyers and clients.
• Assisting the senior leadership team in TL with data related queries.
• Collaboration with marketing team to develop materials and presentations.

Skills, Experience and Education

• A minimum of 1 years’ experience working within the corporate world
• Comfortable in a fast-paced environment
• Detail-oriented, while understanding the big picture
• Experience/keen interest in M&A, insurance sector, or other financial institutions or advisors

Mosaic offers you

• Very competitive total rewards compensation package, reflecting growth of the business
• Opportunity to grow with this class of business

Mosaic celebrates diversity, equity and inclusion. We embrace these pillars of excellence as crucial to our business success. We are an Equal Opportunity Employer.

What We’re Looking For

This role is specifically aimed at graduates with an Insurance & Risk Management degree who want to build a long-term career in insurance risk management. You’ll be:

• Genuinely interested in insurance and risk management.
• Analytical, organised and detail-oriented.
• A confident communicator who can build relationships across the business.
• Curious, proactive and keen to learn.

Interested in developing into a broad risk professional within the Lloyd’s market

Qualifications

• Internship, placement or work experience within insurance.
• Knowledge of the Lloyd’s or London Market.
• Exposure to Power BI, Python or similar analytical tools.

Why Apply?

This is an excellent opportunity for a graduate seeking broad business exposure, early responsibility and a clear career path within insurance risk management. You’ll work with senior stakeholders across the business and develop into a well-rounded risk professional in a leading Lloyd’s market environment.

Please note: Applications are particularly encouraged from graduates holding an Insurance & Risk Management degree and a demonstrable interest in pursuing a career within insurance risk management. We are unable to offer sponsorship for this role, or accept Graduate Visa as this is a permanent opportunity.

In our free Claims Adjuster simulation, you will step into the shoes of a claims professional in the London specialty insurance market and learn all about the role and what it entails. This Free online course will deepen your knowledge and understanding of claims to enhance your applications and boost your CV.

About Arch Insurance International

Arch Insurance International, part of the Arch Capital Group, is a market-leading insurer located in the UK. We provide a range of property, casualty, and specialty insurance for corporations, professional firms, and financial institutions across the UK, Europe and Internationally, with a significant presence in the Lloyd’s and London Underwriting market. Arch Insurance recognises the need to be a digital insurer and as such has shifted focus from traditional technology initiatives to agile driven digital initiatives, leading the commercial & specialty insurance space. Arch offers an entrepreneurial work environment that empowers the individual and encourages constant learning and growth. People are at the centre of everything we do at Arch, and we are passionate about investing in the future talent of the insurance industry. From day one, you’ll be empowered to contribute, grow, and make a difference. Our apprenticeship roles are crafted to give you the tools, experiences, and support you need to thrive.

Role Summary and Purpose

Support the London Market Underwriting Operations team in driving efficiencies and best practices throughout the Underwriting process, challenge how the business operates today and assist in developing systems, processes, and procedures to support the growth of Arch across all platforms. This successful candidate will complete the Level 3 Financial Services Administrator apprenticeship, gaining their Certificate Level CII qualification as part of this role.

Key Tasks and Responsibilities

• Conducting regular data quality checks and basic audits of underwriting data to ensure accuracy and completeness.
• Logging queries received from both internal and external customers, investigating data discrepancies and supporting timely resolution.
• Maintaining and updating operational procedure documents.
• Assisting with reporting activities, such as analysing weekly or monthly processing statistics.
• Collaborating with onshore, offshore and cross functional teams on various tasks and projects.
• Other ad hoc admin tasks from time to time.

Role Requirements & Skills

• MS Office, Excel intermediate
• Excellent communications skills
• Ability to manage multiple tasks, meet deadlines, and prioritize workloads.
• Strong analytical skills
• Problem solver with proactive approach to challenges

To start an apprenticeship, the learner will need to be: 16 or over Living in England and not in full time education.