OneStream Finance Systems Manager
London – days in the office
SystemsAccountants is partnering with a leading international organisation in London to recruit a OneStream Finance Systems Manager. This is a fantastic opportunity to join a business at a pivotal stage in its finance transformation journey, playing a key role in the ongoing development of its Group reporting, consolidation, and planning capabilities.
Working closely with Group Finance, FP&A, Accounting, IT, and international finance teams, you'll take ownership of the OneStream platform, ensuring its effective administration, continuous improvement, and alignment with wider business objectives.
This position offers the chance to make a significant impact as the organisation continues to invest in its financial reporting, planning, and analytics landscape.
Key Responsibilities
OneStream Administration & Governance
- Manage and maintain the OneStream application, including hierarchies, dimensions, metadata, workflows, and reporting structures.
- Administer user security, access controls, approval workflows, and governance processes.
- Oversee reporting cycle activities, including period opens, closes, and workflow management.
- Ensure all system changes are appropriately documented, tested, and controlled.
Financial Reporting & Consolidation Support
- Support monthly, budget, forecast, and long-range planning processes.
- Assist with Group consolidation activities, including intercompany eliminations, FX translation, and consolidation rules.
- Investigate reporting variances and ensure data integrity across finance processes.
- Support the production of management reports, reporting packs, budgets, and forecasts.
Data Integration & Systems Improvement
- Support integrations between OneStream and source systems, including ERP platforms and other finance applications.
- Investigate and resolve data load, mapping, validation, and reconciliation issues.
- Work with Finance and IT stakeholders to improve processes and automate recurring activities.
- Drive enhancements that improve reporting efficiency and reduce manual intervention.
User Support & Stakeholder Engagement
- Act as a key point of contact for finance users across multiple regions.
- Troubleshoot system issues and coordinate resolutions with internal teams and external partners.
- Deliver training, user guidance, and knowledge-sharing sessions.
- Build strong relationships with Finance, IT, and external stakeholders.
Team Leadership & Finance Transformation
- Provide oversight and guidance to Finance Systems Analysts or supporting resources.
- Help prioritise support requests, reporting requirements, and enhancement initiatives.
- Support broader finance transformation programmes involving EPM, ERP, reporting, and analytics solutions.
- Contribute to the long-term finance systems roadmap and capability development.
Required Experience
To be considered for this role, you will have:
- Strong hands-on experience with OneStream administration, support, or development.
- Experience supporting financial consolidation, planning, budgeting, and management reporting processes.
- A strong understanding of finance systems, data flows, integrations, and reporting structures.
- Experience working closely with Finance, FP&A, Accounting, and IT stakeholders.
- Excellent problem-solving and stakeholder management skills.
- Previous experience in a Finance Systems, EPM, Consolidation Systems, or Financial Reporting Systems role.
Desirable
- Experience large ERP environments.
- Exposure to Power BI or wider reporting and analytics platforms.
- Experience supporting finance transformation or system implementation projects.
- Previous team leadership or supervisory experience.
The opportunity:
- Opportunity to take ownership of a strategically important OneStream platform.
- Exposure to senior finance stakeholders across a global organisation.
- Involvement in a major finance transformation and systems enhancement programme.
- Hybrid working arrangement based in London.
- Competitive salary and benefits package.
OneStream Finance Systems Manager employer: Systems Accountants
As a leading organisation in finance transformation, we pride ourselves on fostering a dynamic work culture that values innovation and collaboration. Our London-based team enjoys a flexible working environment with three days onsite and two days remote, alongside opportunities for professional growth through engaging projects and mentorship from senior leaders. Join us to be part of a high-profile programme that not only challenges you but also empowers you to make a significant impact within the finance sector.
