OneStream Application Specialist

Atos is the Atos Group brand dedicated to AI-powered, secure, end-to-end digital services. Atos designs, develops, and operates critical digital environments that drive performance, resilience and sovereignty, helping public and private organizations worldwide retain control over their data and infrastructures, while meeting regulatory requirements.

With more than 52,000 employees serving over 4,500 clients across 54 countries, Atos helps modernize core IT systems, accelerate cloud and data transformation, strengthen cybersecurity, and deliver secure digital workplace environments to support its clients, its employees and society. Atos also provides consulting and advisory services through its Atos Amplify brand.
A trusted partner in operating complex and mission-critical environments, Atos supports organizations across highly regulated and sovereign contexts.

About Atos Group

Atos Group is a global leader in digital transformation with c. 54,000 employees and annual revenue of c. €7.2 billion, operating in 54 countries under two brands - Atos for services and Eviden for products and systems. European number one in cybersecurity and a leader in cloud, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos Group is listed on Euronext Paris.

Role :

Design, develop, support, and optimise OneStream solutions that enable financial consolidation, planning, budgeting, forecasting, reporting, and analytics across the organisation.

Key Responsibilities

• Configure and maintain OneStream applications, workflows, and metadata.
• Develop and enhance:  Cube Views; Dashboards; Reports; Forms; Workflow profiles; Business Rules (VB.NET);
• Support financial consolidation processes: Intercompany eliminations; Currency translation ; Ownership management; Financial close and reporting
• Build planning and forecasting models.
• Manage data integrations with ERP and source systems.
• Troubleshoot functional and technical issues.
• Support Smart View reporting and Excel integrations.
• Work closely with Finance, Controlling, Treasury, Tax, and IT teams.
• Perform testing, UAT support, deployment, and documentation.
• Drive process improvements and automation initiatives.

Required Skills

• 3+ years of Enterprise Performance Management (EPM) experience.
• Excellent English skills. French will be an advantage.
• Hands-on experience with OneStream implementation and support.
• Strong knowledge of:  OneStream XF; VB.NET Business Rules; SQL Server; Financial Consolidation; FP&A processes
• Understanding of: Budgeting & Forecasting; Close & Consolidation; Management Reporting; Data Governance

Preferred Skills

• Experience with One Stream, Hyperion/HFM, FCCS, Anaplan, SAP BPC, or similar EPM platforms.
• Knowledge of REST APIs and system integrations.
• Exposure to Treasury and Tax reporting processes.
• OneStream certification or official training.

Qualifications

• Bachelor’s degree in finance, Accounting, Computer Science, Information Systems, or related field.
• CA/CMA/CPA or finance qualification is advantageous.

Success Measures

• Timely financial close and reporting.
• Stability of OneStream production environment.
• Reduction in manual reporting effort.
• Improved data quality and reconciliation accuracy.
• Successful delivery of enhancement projects.

What we offer:

• Up to 3 days of remote working per week
• Vouchers (€10 face value, 60% covered by Atos)
• Onboarding events and regular team get-togethers (depending on the business unit/site)
• All your annual leave available from your first day
• Employee referral programme with a bonus of up to €2,750
• Access to social and cultural activities
• Sustainable mobility support (cycling, carpooling)

Your future at Atos

• Concrete and personalised career development opportunities
• More than 600 certified training courses and access to an e-learning platform
• Ongoing support to help you develop and grow

Ready to be part of the journey? Make a difference and join the Atos team!

Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all.

Atos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment. 

Choose your future. Choose Atos.