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Senior Systems & Project Accountant

Milton Keynes - The Avebury💼 Full-time🗓 2026-02-09 → 2026-09-26

Core

Lead the rebuild of the OneStream financial consolidation system for Specialty and Reinsurance divisions, managing UAT, data reconciliation, and process improvements for month-end close and forecasting.

Role type

Senior Systems & Project Accountant (Financial Systems Implementation)

Builds

Production financial consolidation data flows and reporting capabilities within OneStream

Domain

Insurance / Financial Systems / Data Consolidation

Deliverable

production ML models | product features | dashboards & analysis | infrastructure

Required skills

Financial accounting (ACA/ACCA), OneStream or similar consolidation systems, data manipulation, UAT management, process design, Excel, stakeholder management

Preferred skills

Workday integration knowledge, mid-to-large group experience, FP&A collaboration

Technologies

OneStream, Workday, Excel

Responsibilities

Define and manage UAT testing phases (Sprint, E2E, Business Acceptance) for the OneStream rebuild; Perform data reconciliation between OneStream cubes and new applications; Support subsidiary finance teams with reporting queries; Streamline month-end close and forecasting procedures; Collaborate with FP&A teams to improve budgeting and reporting processes.

Seniority

Senior, hands-on IC with project leadership

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