Senior IBA Accountant – London (Hybrid)

About the role

We are supporting a rapidly growing, internationally recognised reinsurance business in London. The Senior IBA Accountant will join a collaborative finance team, working across UK and overseas operations to ensure accurate client‑money handling and robust financial controls.

Key responsibilities

• Own IBA processes, including cash allocation, insurer settlements and client‑money management.
• Perform and review reconciliations for client‑money and insurer accounts.
• Support and contribute to Client Money Calculations in line with FCA CASS 5 requirements.
• Manage aged balances and resolve unallocated cash issues.
• Liaise with brokers, underwriters and internal finance teams across UK and overseas offices.
• Support audits and maintain strong financial controls.
• Identify and implement process improvements within IBA operations.

Required profile

• Proven experience in an IBA or insurance accounting role.
• Background in an insurance broker, MGA or reinsurance environment.
• Confidence managing reconciliations, settlements and stakeholder queries.
• Strong attention to detail with a proactive, solutions‑focused mindset.
• Comfortable working in a fast‑paced, international environment.

Required skills

What we offer

• Hybrid working model – four days in the London office.
• Exposure to a global reinsurance finance function.
• Opportunity to join a growing and ambitious business.