Group Reporting Accountant

Report & Consolidation Accountant (OneStream Implementation)

Location: London (hybrid)

A high-growth, international business is undergoing a significant finance transformation and is investing in a best-in-class reporting and consolidation environment, with OneStream at the core.

This is a pivotal role sitting at the intersection of finance, systems, and transformation, ideal for someone who enjoys combining technical accounting with change and implementation work.

The Role

You will play a key role in the design and delivery of a new group consolidation and reporting framework, ensuring that financial processes, controls, and structures are effectively embedded into OneStream.

Working closely with finance, IT, and external implementation partners, you will help shape a scalable, high-quality reporting environment across the group.

Key Responsibilities

Financial Consolidation & Reporting

• Support the design and configuration of group consolidation processes within OneStream
• Define and enhance statutory and management reporting outputs
• Validate consolidation logic, including intercompany eliminations, FX, and ownership structures
• Build and refine standardised financial statements, dashboards, and KPI reporting

Systems Implementation (OneStream)

• Translate finance requirements into system decollaboration with stakeholders and implementation partners
• Contribute to data integration, chart of accounts alignment, and metadata structures
• Support testing cycles (SIT/UAT), including test design, execution, and issue resolution
• Assist in developing calculation rules, workflows, and reporting logic

Data & Governance

• Ensure accuracy and integrity of financial data across entities
• Support the development of governance frameworks for master data and reporting hierarchies
• Document processes, controls, and system configurations

Change & Stakeholder Engagement

• Support the transition from legacy systems to OneStream
• Deliver training and act as a key point of contact for finance users
• Act as a subject matter expert on consolidation and reporting throughout the programme

About You

• Qualified (or close to) ACA / ACCA / CIMA
• Strong grounding in group consolidation and financial reporting (IFRS or similar)
• Experience with EPM / consolidation tools (OneStream preferred; HFM, SAP BPC, Tagetik also relevant)
• Comfortable working across finance and technology teams
• Strong analytical mindset with high attention to detail

Why Apply?

• Opportunity to be part of a high-profile finance transformation programme
• Exposure to senior stakeholders and strategic decision-making
• A chance to develop both technical accounting and systems expertise
• Clear scope to add value and shape the future state of group reporting