Human Resources System Administrator in London

Location: London (Hybrid – 3 days/week in office)

Employment Type: Full Time / Permanent

Established in London in 2004, Phaidon International was founded with the ambition to deliver talent solutions backed by deep industry expertise. Since then, we have consistently ranked among the fastest-growing recruitment firms globally and are currently the 10th largest direct-hire agency in the world. We partner with a wide range of businesses - from Fortune 500 companies to venture-backed start-ups - to deliver the right talent for mission-critical roles. Operating through global hubs, our consultants offer localised knowledge combined with international reach, helping clients navigate regional complexities and achieve both immediate and long-term hiring goals.

The HRIS Administrator will be responsible for supporting the day-to-day management, configuration, and optimization of our HRIS system (Microsoft Dynamics 365 Finance & Operations - HR module). This role is a key resource enabling the Global People Operations team to use the platform effectively across the employee life cycle, ensuring accurate employee data, reliable workflows/integrations, and timely, validated submissions to Payroll. You will partner closely with People Operations, Payroll, HR Business Partners, Talent Acquisition and IT to resolve issues, improve processes, and deliver a consistent employee and manager self-service experience. This position reports into the Global Head of People Operations and supports colleagues across multiple regions.

• Own HR systems issue intake, troubleshooting, resolution, and escalation as appropriate whilst keeping stakeholders informed on status and timelines.
• Ensure consistent and accurate processing of transactional data changes throughout the employee life cycle (new hires, transfers, adjustments, promotions, terminations).
• Proactively identify opportunities for automation, system and process improvements and support implementation through testing and change communication.
• Manage user and employee self‑service accounts, security roles, duties and privileges to ensure access aligns to role-based controls and internal policies.
• Maintain HR system configurations, workflows, and organizational hierarchies.
• Handle data import/export activities.
• Own employee data governance by running audits/validations, cleansing data, and troubleshooting root causes of integrity issues.
• Validate HR data submissions to Payroll in line with the global pay cycle and produce standard/ad hoc reporting to support HR metrics.
• Collaborate with internal teams (IT, IR, L&D) on integrations to and from the HRIS, ensuring seamless flow of data.

• Provide training and guidance to users on system functionalities and best practices.
• Ensure the HRIS adheres to data privacy laws and other regulations by applying access controls and flagging risks promptly.

• Support the People Operations team with admin duties on an ad hoc basis.
• Support the People Partners and Operations teams with cyclical admin tasks such as pay review cycles and promotions.

• Proficiency in Excel, including PivotTables, X‑Lookups, and formulas to validate data, reconcile variances and produce clear operational reporting.
• Experience with Microsoft SQL and Power BI (desirable, not essential) to support automation.
• Understanding of HR processes (positions, jobs, compensation, benefits).
• Working knowledge of workflow configuration and approval processes.
• Ability to work cross‑functionally with HR/TA/Payroll/Finance/L&D/IT in a fast‑paced environment on simultaneous projects.
• Positive, can‑do and open mindset, with a continuous improvement approach to systems and service delivery.
• Professional maturity when handling personal and sensitive employment and performance records.