Onestream Consultant

Altum Consulting; City Of London; On-site; GBP 120,000 - 130,000; Full time

Job summary

A leading consultancy firm in London is seeking a OneStream Consultant to play a key role in the rollout and optimisation of OneStream within finance operations. The ideal candidate will have hands-on experience with OneStream and strong skills in change management. This role offers a hybrid working model with opportunities for professional development and significant influence on global finance transformation.

Benefits

Private medical insurance

Pension

Life assurance

Flexible working

Professional development

Qualifications

• Hands-on experience with setup, configuration, governance, and data integration of OneStream.
• Strong skills in change management and stakeholder influencing.
• Knowledge of group finance operations and reporting principles.

Responsibilities

• Translate technical capabilities of OneStream into business value.
• Collaborate with C-suite stakeholders to influence finance strategy.
• Configure and maintain OneStream systems and governance.

Skills

OneStream experience

Change management

Finance systems collaboration

Data integration

Tools

ERP tools

Job description

Job Title: OneStream Consultant
Location: London / Hybrid (office & remote)
Salary: £120,000 - £130,000 base + up to 20% bonus
Benefits: Private medical insurance, pension, life assurance, flexible working, professional development

About the Role

Join a PE‑backed organisation undergoing major finance transformation and global growth. This role is central to the rollout and optimisation of OneStream, influencing global finance operations, driving adoption, and shaping processes across multiple entities.

This is a high‑impact opportunity to directly influence strategy, work with senior stakeholders, and advance into leadership roles.

Key Responsibilities

• Advocate for OneStream, translating technical capabilities into business value for both detailed and strategic audiences.
• Collaborate with senior stakeholders, including C‑suite, to drive adoption and influence finance strategy.
• Configure, troubleshoot, and maintain OneStream, including setup, governance, and ongoing system management.
• Lead or work alongside sophisticated teams, ensuring effective operation and knowledge transfer.
• Support group‑wide data integration and help define "how we do things" across the business.
• Work with external consultants and internal teams to ensure smooth system operation.
• Participate in workshops, training, and occasional travel.

Skills & Experience

• Hands‑on OneStream experience: setup, configuration, governance, and data integration.
• Experience managing or collaborating with sophisticated teams in finance systems.
• Strong change management and influencing skills, able to drive adoption and improvements globally.
• Knowledge of group finance operations, reporting, and consolidation principles (accounting qualification not required).
• Ability to advocate for OneStream internally at both detailed and strategic levels.
• Experience integrating OneStream with ERP or reporting tools is advantageous.

Why Join

• Directly influence global finance transformation.
• Work in a fast‑moving, high‑growth environment with senior visibility.
• Hybrid working with flexible arrangements and professional development opportunities.
• Collaborative culture that rewards initiative and impact.