Senior Business Systems Administrator

Norfolk St, Sheffield City Centre, Sheffield S1 2JE
, UK

Job Title: Senior Business Systems Administrator

Department: Business Change & Transformation

Location: Sheffield

Working Pattern: Hybrid, includes 3 days each week in the office

Contract Type: Full time, permanent

Salary: Up to £65,000 per annum

At Tes we are on a mission to power schools and enable great teaching worldwide, by delivering EdTech solutions that give educators the tools to succeed. From safeguarding and compliance to staff and pupil management, our innovative and flexible software and services help teachers and school leaders worldwide to provide the best education to millions of children.

With more than 13 million educators in our community, combined with our working relationships with 25,000 schools in over 100 countries, we have been making a difference for over 100 years.

As a Senior Business Systems Administrator, you will play a critical role in the ownership, design, and evolution of Tes’ customer‑and business‑critical platforms. You will be accountable for ensuring these systems are secure, resilient, and scalable, while proactively shaping how technology enables business strategy and customer experience.

Bringing deep technical expertise and commercial awareness, you will act as a trusted advisor to stakeholders, lead complex system changes and integrations end‑to‑end, and provide expert‑level support for high‑impact incidents. You will also influence platform strategy, mentor less‑experienced colleagues, and drive continuous improvement through automation, optimisation, and adoption of best practice.

• Own the reliable, secure, and performant operation of key business and customer‑facing systems
• Ensure systems meet availability, security, compliance, and data integrity standards
• Lead investigation and resolution of complex, high‑severity incidents and root‑cause analysis
• Proactively identify and mitigate technical debt, risks, and performance issues
• Participate in and help shape on‑call support and escalation processes

• Lead the design, implementation, and ongoing optimisation of complex systems, configurations, and integrations
• Translate business strategy and requirements into robust, scalable technical solutions
• Act as a senior technical contributor on projects, providing design authority and assurance
• Plan and execute system upgrades, releases, and major configuration changes with minimal disruption
• Ensure appropriate testing, quality assurance, release management, and documentation practices are followed
• Contribute significantly to platform strategy, roadmap definition, and technology direction
• Evaluate new tools, features, and technologies, making evidence‑based recommendations
• Drive automation, scripting, and process improvements to increase efficiency and reliability
• Promote and embed best practice in systems administration, security, and service management
• Stay current with industry trends and apply relevant innovations to improve Tes’ platforms and services
• Act as a senior point of escalation for technical advice and decision‑makingli>
• Build strong relationships with business, product, delivery, and third‑party partners
• Mentor and support junior and mid‑level administrators, sharing knowledge and raising capability across the team
• Contribute to standards, patterns, and documentation that support consistency and scalability

• Significant hands‑on experience in a Senior Systems Administration or similar role
• Proven experience supporting and enhancing business‑critical platforms such as CRM, finance systems, and/or contact centre technologies
• Demonstrable experience leading complex system changes, integrations, or migrations
• Experience operating within change‑controlled, service‑oriented environments

• Deep knowledge of systems administration principles, including security, access control, data governance, resilience, and lifecycle management
• Strong understanding of how enterprise platforms support end‑to‑end customer journeys and business processes
• Good awareness of service management…