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Atos

Global IT services, consulting, digital transformation

OneStream Application Specialist

Full-Time
No salary listed
Mid
Master's
Bezons, France
HybridUp to three days of remote work per week.
IT OperationsEnterprise Applications

About the job

Requirements
  • At least three years of experience in Enterprise Performance Management (EPM).
  • Practical experience implementing and supporting OneStream solutions.
  • Knowledge of OneStream XF, VB.NET and business-rule development, SQL Server, financial consolidation, financial planning and analysis (FP&A), financial budgeting and forecasting, financial close and consolidation, management reporting, and data governance.
  • A strong level of English is required.
  • A Bac+5 degree in finance, accounting, computer science, information systems, or an equivalent field.
Responsibilities
  • Configure and maintain OneStream applications, workflows, and metadata.
  • Design, develop, and improve Cube Views, dashboards, reports, forms, workflow profiles, and VB.NET business rules.
  • Support financial consolidation processes, including intercompany eliminations, currency conversion, ownership management, financial close, and reporting.
  • Design and develop financial planning and forecasting models.
  • Manage data integrations between OneStream, enterprise resource planning systems, and source systems.
  • Analyze and resolve functional and technical incidents and issues.
  • Support reporting through Smart View and integrations with Excel.
  • Collaborate with Finance, Management Control, Treasury, Tax, and IT teams to meet business needs.
  • Conduct testing, support user acceptance testing (UAT), participate in deployments, and document solutions.
  • Identify and implement process improvements and automation initiatives.
  • Help ensure timely financial closes and reporting, maintain the stability and reliability of the OneStream production environment, reduce manual reporting tasks, improve data quality and reconciliation accuracy, and deliver OneStream solution enhancements and improvements.
Desired Qualifications
  • Experience with OneStream, Hyperion/HFM, FCCS, Anaplan, SAP BPC, or similar EPM platforms.
  • Knowledge of REST APIs and system integrations.
  • Experience with or understanding of treasury- and tax-related reporting processes.
  • OneStream certification or official training on the solution.
  • French proficiency.
  • A CA, CMA, CPA, or other financial qualification.

About the company

Atos is a global IT services and consulting firm that helps big companies and governments run and improve their digital systems. It offers services like cloud computing, cybersecurity, big data, and digital transformation, delivering these through consulting, system integration, outsourcing, and managed services to keep complex IT environments functioning smoothly. What sets Atos apart is its long history of growth by acquiring other firms, building a wide footprint across Europe and North America, and combining diverse capabilities into one large service provider. After a period of financial restructuring to reduce debt, Atos is focused on stabilizing its finances and returning to growth and more acquisitions by 2026.

Company Size

10,001+

Company Stage

IPO

Headquarters

Bezons, France

Founded

1997

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Simplify's Take

What believers are saying

  • Atos closed €1.25 billion senior secured notes and repaid the 1L facility in June 2026.
  • H1 2026 margin rose to 5.7%, with Genesis savings already at 112% of target.
  • Backlog reached €9.1 billion in June 2026, supporting delivery visibility into 2027.

What critics are saying

  • H1 2026 carried €384.5 million litigation provisions, including a U.S. Syntel case.
  • Atos recorded €-94 million litigation charges and €-44 million onerous-contract losses in H1 2026.
  • Revenue fell 11% organically in Q1 2026, and the remaining shrinkage threatens recovery.

What makes Atos unique

  • Atos spans sovereign cloud, cybersecurity, and public-sector digital operations across 54 countries.
  • The June 2026 Metropolitan Police win deepens its UK critical-infrastructure footprint.
  • Its EU-designed sovereign AI and cloud stack targets regulated buyers needing local control.

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Benefits

  • Paid Vacation
  • Health Insurance
  • Life Insurance
  • Training Programs
  • Employee Discounts
  • Hybrid Work Options

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

6%
Yahoo Finance
Oct 5th, 2026
Atos wins $445M contract to manage Metropolitan Police Service digital systems

Atos has secured a six-year contract worth up to £350 million with the Metropolitan Police Service (MPS), with the option to extend for two additional years. The agreement will see Atos deliver service management, application management, and application security services to support the MPS's digital infrastructure. The contract includes the potential for expansion into managed cloud and digital workplace services. Atos will maintain key business applications across the MPS technology estate, following ITIL best practices to ensure high availability and security. Jamie Hewitt, director of Digital Product Delivery at MPS, said the collaboration will provide a stable digital foundation supporting frontline policing. The partnership builds on Atos's long-standing relationship with the Metropolitan Police Service, one of the UK's most critical public sector organisations.

Yahoo Finance
Sep 17th, 2026
Atos opens AI-driven Security Operations Center in UAE with GCH partnership

Atos has partnered with Gulf Cyberfender Hub to launch an AI-driven Security Operations Center in Dubai. The facility will provide sovereign security operations with local data residency, supporting UAE organisations in strengthening cyber resilience and complying with national electronic security requirements. The SOC will serve government entities, critical infrastructure operators, and enterprises, offering locally operated monitoring, detection, and incident response capabilities. It uses advanced analytics, automation, and agentic AI to reduce mean time to detect and respond to threats. The centre will collaborate with Atos' Global Threat Research Center to deliver threat intelligence tailored to the regional landscape. The opening aligns with the UAE's national cyber resilience priorities and digital sovereignty objectives.

Yahoo Finance
Jul 23rd, 2026
Atos launches EU-designed Sovereign Cloud platform for government and critical infrastructure modernisation

Atos has launched Atos Sovereign Cloud, a next-generation application platform designed for governments, defence organisations, healthcare providers, and critical infrastructure operators. The cloud service combines enterprise capabilities with sovereign controls for data management, operational independence, and cyber resilience. Designed and engineered in the EU, the platform addresses growing demand for sovereign IT services amid stricter regional regulations. Gartner predicts over 50% of multinational organisations will have digital sovereign strategies by 2029, up from less than 10% today. The platform leverages Atos' expertise in cloud transformation, cybersecurity, and AI infrastructure. It enables organisations to modernise mission-critical applications whilst maintaining control over data, operations, and IT supply chains. The service forms part of Atos Group's integrated digital sovereignty strategy.

Associated Press
Jul 8th, 2026
Kore.ai partners with Atos to deliver sovereign agentic AI for UK enterprise

Kore.ai has partnered with Atos UK&I to deliver sovereign agentic AI solutions for regulated UK organisations. The collaboration combines Kore.ai's Agent Platform Artemis with Atos' Sovereign Agentic Studio's infrastructure and governance frameworks. The AI agents will be deployed from Atos' UK-based Sovereign Agentic Studio, targeting public sector, financial services, healthcare, defence, and critical national infrastructure sectors. The partnership aims to help enterprises move from AI pilots to production-grade systems whilst maintaining security and compliance. The initiative addresses requirements under the EU AI Act, which takes effect in August 2026, by providing governed, explainable, and controlled AI systems. Kore.ai serves over 500 Global 2000 companies, whilst Atos Group operates in 54 countries with approximately 56,000 employees and annual revenue of around €7.2 billion.

Yahoo Finance
Jun 11th, 2026
Atos doubles liquidity contract resources to $4.5M with Rothschild Martin Maurel

Atos has increased the resources allocated to its liquidity contract with Rothschild Martin Maurel from €2 million to €4 million. The amendment to the agreement, originally signed in February 2019, was executed on 11 June 2026. As of 10 June, the liquidity account held 5,000 Atos shares and €1,378,930.88. Following the increase, the account now comprises 5,000 shares and €3,829,700.00. All other provisions of the agreement remain unchanged, including conditions for suspension or termination. The increase complies with EU market abuse regulations and French commercial code requirements. Atos is a global digital transformation leader with approximately 56,000 employees and annual revenue of €7.2 billion, operating in 54 countries.