Onestream system administrator

About UsSophos is a cybersecurity leader defending 600,000 organizations globally with an AI-driven platform and expert-led services. Sophos meets organizations wherever they are in their security maturity and grows with them to defeat cyberattacks. Its solutions combine machine learning, automation, and real-time threat intelligence with frontline human expertise from Sophos X-Ops to deliver advanced, 24/7 threat monitoring, detection, and response. Sophos offers industry-leading managed detection and response (MDR) alongside a comprehensive portfolio of cybersecurity technologies — including endpoint, network, email, and cloud security, extended detection and response (XDR), identity threat detection and response (ITDR), and next-gen SIEM. Together with expert advisory services, these capabilities help organizations proactively reduce risk and respond faster, with the visibility and scalability needed to stay ahead of evolving threats. Sophos goes to market with a global partner ecosystem, including Managed Service Providers (MSPs), Managed Security Service Providers (MSSPs), resellers and distributors, marketplace integrations, and cyber risk partners, giving organizations the flexibility to choose trusted relationships when securing their business. Sophos is headquartered in Oxford, More information is available at .ROLE SUMMARY This position will report to the Global Accounting Compliance Controller and will be responsible for maintaining and managing the Onestream system. You will be responsible for ensuring the integrity, performance, and reliability of the system, troubleshooting and resolving system issues, while also supporting end users and driving enhancements to meet evolving business needs. Working closely with Finance and IT teams, the Onestream Administrator will contribute to the continuous improvement of financial control and reporting processes, ensuring data accuracy, compliance, and operational efficiency. This includes leveraging automation and emerging AI capabilities, within Onestream and complementary tools, to enhance data quality, streamline workflows, and improve user experience. The role will also be responsible for producing documentation, developing and delivering user training and driving strategic roadmap development to ensure alignment with business objectives and system evolution. The role has no direct reports but will be supported by another team member who will assist with day-to-day and BAU (business-as-usual) system administration tasks.

What you will do

System administration:

Metadata management

User management (set up, disablement, access controls etc)

Manage system configuration

Maintain and support manual and automated interfaces and integrations with SAP

Data management, including data loading, validation and reconciliation processes to ensure accuracy across entities and reporting hierarchies

System monitoring and issue resolution – oversee daily system operations, identify, troubleshoot and resolve system issues promptly to ensure smooth operations

Identify opportunities to apply automation or AI-driven controls to enhance accuracy, improve data validation, or reduce manual effort where appropriate

User training and support:

Act as first point of contact for user queries

Responsible for managing the JIRA ticketing system

Provide structured user onboarding, training and ongoing knowledge sessions

Use AI-enabled tools to enhance training materials, user communications, and documentation where beneficial

Process improvement and roadmap development:

Identify and implement opportunities to optimize system usage and streamline existing processes

Keep up to date with emerging developments and trends in the Onestream Solution Exchange with a view to optimize Sophos processes by leveraging the latest functionality

Collaborate with stakeholders to define and maintain a Onestream roadmap, ensuring enhancements align with strategic business priorities

Evaluate and integrate emerging AI capabilities, such as predictive analytics, automated reconciliations, workflow optimization, and intelligent reporting, into the roadmap where relevant

Other:

Reporting & Analysis: Support the design, development, and maintenance of Onestream reports, dashboards, and templates for reporting. Contribute to opportunities to incorporate AI-assisted insights where appropriate

Upgrades & Enhancements: Assist with system upgrades, testing, and deployment of new features or modules, including those involving automation or AI functionality

Collaboration: Work closely with Finance, IT, and external consultants to ensure the system supports compliance, control, and operational excellence.

Documentation: Develop and maintain comprehensive system and process documentation, including user guides, change logs, and configuration records; use AI tools to improve clarity, version control, and efficiency of documentation workflows

Maintain up to date knowledge of Onestream.

Actively participate in internal AI and digital finance learning programs.

Attend relevant workshops, industry forums and professional development events to stay informed of best practices and emerging technologies in finance automation.

Holiday restrictions apply at month-ends, quarter ends and financial year end.

What you will bring

Essential

Experience in Onestream system administration

Proficient in Excel and other Office 365 applications

Understanding of accounting concepts and principles

Knowledge of core financial processes and best practices

Demonstrated ability to troubleshoot and resolve system issues with the ability to communicate technical concepts to non-technical users

Business partnering experience and managing various stakeholder relationships

Experience in user training and system roadmap development

Experience documenting processes and procedures

Excellent troubleshooting and problem solving skills

Degree level or equivalent

Desirable

Exposure to AI- or automation-enabled finance tools.

Exposure to other various systems – experience of SAP would be an advantage

Working within a software company, ideally a global organisation and as part of a global finance team supporting global actions and initiatives

Experience supporting system upgrades, testing cycles, or user acceptance testing (UAT).

Working on Financial systems projects/ the implementation of Financial systems

Experience with Onestream business rules and building cube views

Project management experience

Degree in Accounting, Finance, Information Systems, or a related field

Professional qualification or part-qualification (, ACCA, CIMA) is an advantage

#B2 #LI-ND2Ready to Join Us? At Sophos, we believe in the power of diverse perspectives to fuel innovation. Research shows that candidates sometimes hesitate to apply if they don't check every box in a job description. We challenge that notion. Your unique experiences and skills might be exactly what we need to enhance our team. Don't let a checklist hold you back – we encourage you to apply. What's Great About Sophos? · Sophos operates a remote-first working model, making remote work the primary option for most employees. However, some roles may necessitate a hybrid approach. While we are a remote first organization, applicants must have legal authorization to work in the jurisdiction where the position is posted, without requiring employer sponsorship. · Our people – we innovate and create, all of which are accompanied by a great sense of fun and team spirit · Employee-led diversity and inclusion networks that build community and provide education and advocacy · Annual charity and fundraising initiatives and volunteer days for employees to support local communities · Global employee sustainability initiatives to reduce our environmental footprint · Global fitness and trivia competitions to keep our bodies and minds sharp · Global wellbeing days for employees to relax and recharge · Monthly wellbeing webinars and training to support employee health and wellbeing