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Certes Computing Ltd

Senior SQL DBA

On site

Milton keynes, United kingdom

£ 410 /day

Senior

Freelance

18-02-2026

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Skills

Python Bash PowerShell SQL Data Governance MySQL PostgreSQL Encryption Security Auditing SQL Server ETL Processes

Job Specifications

Senior SQL DBA

Duration: 6 months

Location: Milton Keynes & remote (hybrid)

Rate: £400 per day

IR35 Status: Inside

Start: ASAP

A Senior SQL DBA is required for our Government Client who will be responsible for the design, implementation, maintenance and optimisation of their enterprise database systems Microsoft SQL Server.

This role also supports and administers additional database platforms including PostgreSQL and MySQL to ensure reliability, security, performance and availability across the data environment.

As the Senior SQL DBA you will collaborate closely with their application teams, infrastructure engineers and business stakeholders to deliver efficient and scalable data solutions.

Essential Skills & Experience required

As the Senior SQL DBA you will possess the following:

5 years + experience administering Microsoft SQL Server in production/secure environments

Hands-on expertise with PostgreSQL and MySQL database administration

A strong understanding of T-SQL, SQL query optimisation and database internals.

Duties include:

Install, configure, patch, and maintain Microsoft SQL Server, PostgreSQL, and MySQL database environments.

Monitor database performance and proactively tune queries, indexes, and server configurations.

Perform routine health checks and ensure high availability and disaster recovery solutions (AlwaysOn, log shipping, replication, clustering).

Manage database backups, recovery strategies, and restore testing across all platforms.

Analyse slow-running queries and optimise performance using execution plans and profiling tools.

Implement indexing strategies, data archiving, and partitioning where appropriate.

Conduct capacity planning and forecasting for growth.

Implement and maintain database security controls including authentication, encryption, auditing, and role-based access.

Ensure compliance with company policies, data governance frameworks, and regulatory standards.

Manage user accounts, roles, privileges, and security auditing.

Database Design & Development

Support developers with database design, schema improvements, stored procedures, functions, and triggers.

Collaborate on data modelling efforts (logical and physical models) for new applications and enhancements.

Assist with ETL processes, data migrations, and integration projects across heterogeneous systems.

Resolve database related incidents, performance issues and service disruptions

Automate routine tasks using PowerShell, Bash, Python or SQL based scripts.

Support cross platform replication, data synchronisation and migration activities between MS SQL, PostgreSQL and MySQL.

If this role is of interest please email your CV to: (see below)

Certes Computing (and all of its subsidiary companies) is committed to promoting equality and diversity in its business operations.

About the Company

Certes began in 1983 as an IT development company. With 4 decades of experience, today, we have grown to become leading experts in delivering IT service solutions. Experienced in agile IT resource planning, we help organisations across a range of sectors, supporting their transition to new services and technologies. With a continued focus on the digitisation of services as part of organisational transformation, the demand for high-quality IT resources is increasing. As a specialist provider of IT professionals and capability... Know more