Senior Lead Architect – OneStream

Company: Systems Accountants
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Job Description:

Lead Architect – OneStream

Location: London – Hybrid working

Type: Full-time

Salary: Competitive + Benefits

Our client, a Global OneStream Vendor and leader in digital transformation and enterprise performance management are seeking to expand their services in the UK, they are now keen to bring on board a visionary Lead Architect with deep expertise in OneStream to join their team and shape the future of finance technology.

The Role

As Lead Architect, you will bring a deep understanding and implementations experience on OneStream. You’ll collaborate with cross-functional teams, guide technical design, and ensure scalable, high-performance solutions that meet complex business needs. This is a hands‑on leadership role where innovation meets execution.

Key Responsibilities

  • Lead the architectural design and delivery of OneStream solutions across enterprise clients
  • Define best practices, standards, and governance for OneStream implementations
  • Collaborate with finance, IT, and business stakeholders to translate requirements into scalable architecture
  • Mentor and guide development teams, ensuring technical excellence and alignment with business goals
  • Stay ahead of industry trends and OneStream product updates to drive innovation
  • Support pre‑sales activities, including solution design and technical presentations

What they’re Looking For

  • Proven experience as a Lead Architect or Senior Consultant in EPM or CPM platforms
  • 3+ years of hands‑on experience with OneStream, including design, configuration, and deployment
  • Strong understanding of financial consolidation, planning, and reporting processes
  • Expertise in data integration, performance optimisation, and cloud architecture
  • Excellent communication and stakeholder management skills
  • Ability to lead and inspire technical teams in a fast‑paced environment
  • OneStream certification is a plus

What they Offer

  • A collaborative, forward‑thinking culture
  • Opportunities to work on global, high‑impact projects
  • Professional development and certification support
  • Flexible working arrangements
  • Competitive compensation and benefits package

To apply for this role:

Please email chanel@systemsaccountants.com to register your interest in this job opportunity or to find out more about it. Please reach out to hear about all the EPM opportunities SA are handling currently.

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Posted: May 27th, 2026