SQL Database Administrator

Join OneAdvanced

OneAdvanced IT Services delivers managed IT, cloud and security services to large enterprise and public sector organisations across the UK. We are looking for an experienced Microsoft SQL Server DBA to join our Database team, supporting high-profile customers whose services depend on fast, secure and resilient data platforms.

This is a hands-on, third-line technical role. You will own the health, performance and security of customer SQL Server estates across on-premises and Microsoft Azure, and you will be a trusted technical voice with customers and colleagues alike.

What You Will Do

• Performance tuning and optimisation of database servers and databases: diagnosing and resolving slow queries, blocking, deadlocks and resource contention using execution plans, Query Store, wait statistics, DMVs and Extended Events; driving indexing strategy, statistics maintenance and instance configuration (memory, MAXDOP, tempdb) to deliver measurable improvements.
• Building, configuring, securing and operating SQL Server across its whole lifecycle, including Always On availability groups, failover clustering, replication, SSIS, SSRS and SSAS, on-premises and in Azure (Azure SQL Database, Azure SQL Managed Instance and SQL Server on Azure VMs).
• Protecting customer data: designing and testing backup, restore, high availability and disaster recovery plans against agreed RPO and RTO targets.
• Keeping estates current and secure: patching, version upgrades and migrations, security hardening (e.g. CIS benchmarks), least-privilege access, encryption and auditing, and remediation of vulnerabilities.
• Planning, design and implementation of new builds and migrations for major corporate and government customers, producing high-quality, customer-facing HLD and LLD documentation and maintaining it through the system lifecycle.
• Monitoring and capacity management: using performance tooling such as Foglight to spot problems early, forecast growth and recommend improvements before they affect service.
• Using AI tools safely and responsibly to work more efficiently, for example to accelerate script development, query analysis and documentation, always within OneAdvanced policy and approved tools, and always validating AI-generated output before it reaches a customer environment.
• Resolving incidents, problems and changes within ITIL-aligned processes in ServiceNow, meeting SLAs and OLAs, and leading root cause analysis for database-related major incidents.
• Supporting and mentoring colleagues and customers, and working with internal stakeholders to develop and refine technical solutions and standard operating procedures.
• Participating in the 24x7x365 on-call rota. This is a mandatory requirement of the role.

What You Will Have

• Proven experience administering Microsoft SQL Server in a production enterprise environment, ideally within a managed service provider.
• Demonstrable experience of performance tuning SQL Server instances and databases, with examples of problems you have diagnosed and the improvements you delivered.
• Strong T-SQL skills and experience automating and standardising routine work with PowerShell (e.g. dbatools) or similar.
• Hands-on experience of high availability and disaster recovery technologies, including Always On availability groups and failover clustering.
• Experience of administering SQL in Microsoft Azure, including Azure SQL Database, Managed Instance or SQL Server on Azure VMs.
• Knowledge of security good practice for SQL Server, e.g. CIS hardening, access control, encryption and auditing.
• An understanding of how to use AI tools safely, including protecting customer data, credentials and system details, and critically reviewing AI-generated code before use.
• Experience of working within ITIL-aligned incident, problem and change management processes.
• Understanding of good practice to drive standard, repeatable deployment processes and procedures.
• Clear written and verbal communication, with the confidence to explain technical issues to customers, service managers and senior stakeholders.
• Strong problem-solving skills, a calm approach under pressure and effective prioritisation across multiple customers.
• Willingness and ability to take part in the mandatory 24x7x365 on-call rota.

Please note, applicants must have the legal right to work in the UK at the time of application.

What We Do For You

Wellbeing that means something

• 26 days’ holiday + bank holidays (and the option to buy more) plus 1 paid volunteering day every year
• Exceptional family leave, 26 weeks fully paid maternity/adoption, 4 weeks fully paid paternity, 22 weeks fully paid shared parental leave, plus 5 days paid bereavement leave
• Robust sick pay of up to 13 weeks full pay + 13 weeks half pay
• 24/7 Employee Assistance Programme for confidential support
• Private medical insurance for everyone, no medical-history exclusions

Financial benefits that have your back

• Performance-based rewards tailored to your role, from company-wide bonuses to OTE and commission structures
• Income protection: up to 75% salary for 5 years if you ever need it
• Pension with 5% matched company contributions
• Life assurance worth 4x your salary from day one
• Free financial planning session with the option to engage in more tailored financial coaching.

Grow your career with us

• SkillsHub learning platform with leadership pathways, future-manager training, and a huge online library
• Access to external training and apprenticeships

Making a Difference

• MatchIt! Fundraise for a cause close to your heart and OneAdvanced will match part of the funding
• Pennies from Heaven donate the pennies from your pay check to help make a difference without lifting a finger

Plus plenty other flexible benefits to suit your lifestyle on our RewardHub, including:

• ULEV car scheme with 1,000+ models
• Dental insurance, Health Cash Plan, Critical Illness Cover, Partner Life Cover, Health Assessment, Gym Membership

Who We Are

At OneAdvanced, we are at the forefront of delivering sector-focused technology solutions that simplify complexity, drive meaningful progress, and help build a fairer, more inclusive society.

We’re much more than a software company. We deliver SaaS workflow applications and IT services that power organisations across Education, Government, Healthcare, Legal, Manufacturing, Housing, Retail, and more.

OneAdvanced is one of the UK’s largest business software and services companies. Based in Birmingham (The Mailbox), operating across the UK, Ireland, India, and Australia.

Our secure, scalable platform, including OneAdvanced AI, our private AI service for UK organisations, powers connectivity and innovation across critical sectors. Alongside our software are our IT services, including hosting, managed services, and application modernisation.

We strive to create an inclusive workplace that drives innovation and collaboration, championing diverse perspectives and ideas. Our Environmental, Social and Governance (ESG) strategy is embedded in everything we do, guiding us to create meaningful impact for our people, our customers and the planet.

Proud to be recognised in the Financial Times’ Best Employers 2026 list for the second-year running, an independent and data led ranking based on employee feedback. Join us and become part of a team that’s powering the world of work and making a real difference.

Join us and become part of a team that’s powering the world of work and making a real difference.

Learn more at www.oneadvanced.com