Senior OneStream Analyst (Contract)
Location: Central London (Hybrid – Minimum 2 days onsite per week)
Our client, a leading Insights Consultancy is looking for a Senior OneStream Analyst to join on a contract basis.
This role will be instrumental in supporting the deployment of a standalone OneStream environment.
You’ll work across a range of workstreams including financial consolidation, transaction matching, and tax modules, ensuring a smooth migration from the current group setup to a new independent instance. The role bridges finance, IT, and implementation partners-requiring a strong blend of hands-on EPM systems knowledge, finance transformation experience, and project delivery expertise.

EXPERIENCE:

2-3 years of hands-on OneStream platform experience across design, integration, migration, and testing
Experience in a Business or Functional Analyst in finance systems or transformation programmes
Strong knowledge of financial reporting, data analysis, and system configuration
Track record in managing testing phases including SIT/UAT

User Journey & Experience Mapping
Assess existing system configuration and workflows
Design and document improved user journeys, highlighting pain points and optimisation opportunities
OneStream System Separation
Lead the analysis and documentation of requirements for the new standalone system
Support the design and implementation of a fit-for-purpose finance data model
Partner with vendors and internal teams to guide a smooth systems transition
Data Migration
Collaborate with data, finance, and technical teams to develop a migration and retention approach
Support data validation, cleansing, and readiness for go-live
Assist with user training and hypercare post-deployment
Testing & UAT Oversight
Design detailed test plans and manage UAT activities
Ensure business processes and data are effectively validated in the new environment
Stakeholder Engagement
Serve as the interface between technical teams, end-users, and external partners
Facilitate workshops and working sessions to capture and prioritise business needs
Risk Management
Identify, log, and track risks and issues related to finance platform separation
Recommend mitigation strategies to minimise business disruption
Experience & Skills Required