OneStream Process & Platform Manager

  • Mars, Incorporated and its Affiliates
  • Slough, Berkshire
  • 18/05/2026
Full time Information Technology Telecommunications

Job Description

Job Description:

Location: Slough
Contract Type: Permanent

We're looking for a OneStream Process & Platform Manager to help us keep our financial systems running smoothly while continuously improving how we work.

You'll be part of a collaborative team of three OneStream experts, supporting a global platform that drives better decisions across our business.

Whether you come from a traditional finance background, IT, or a mix of both. If you're passionate about systems, problem-solving, and making an impact, we'd love to hear from you.

What will be your key responsibilities?
  • Support and execute administrative responsibilities within the OneStream application including metadata, workflows, data sources, transformation rules, cube views, dashboards, reporting, and user security.
  • Understand vb.net to support business rule and member formula troubleshooting and maintenance.
  • Support manual and automated interfaces and integrations with upstream and downstream systems.
  • Create and maintain technical documentation, including system configurations, processes and procedures, and integrations.
  • Troubleshoot user issues during the close process including conducting root cause analysis.
  • Support internal audit controls, processes, procedures, and documentation.
  • Provide recommendations for enhancements and upgrades.
  • Understand and support aspects of Software Development Life Cycle for OneStream enhancements.
  • Support OneStream user training and education as required.
  • Stay abreast of emerging technologies and trends in OneStream Solution Exchange including XF platform and solutions.
What are we looking for?
  • Bachelor's degree in finance, Accounting, Business Administration, IT, or a related field.
  • 3+ years' experience in EPM systems with 2+ years of OneStream experience.
  • Deep understanding of corporate accounting consolidation processes.
  • Strong understanding of Excel/MS Office.
  • Strong attention to detail.
  • Excellent communication skills in English both written and verbal.
  • Demonstrated and proven skill in completing assignments accurately and independently.
What can you expect from Mars?
  • Work with diverse and talented Associates, all guided by the Five Principles.
  • Join a purpose driven company, where we're striving to build the world we want tomorrow, today.
  • A strong focus on learning and development support from day one, including access to our in house Mars University.
  • An industry competitive salary and benefits package, including company bonus.