Senior Systems Administrator

Senior Systems Administrator

Permanent, Full-Time
5 days per week on site in Hertfordshire (free onsite parking)
Up to 75k per annum

We're looking for a Senior Systems Administrator to join a growing dynamic team, reporting to the UK Head of Infrastructure.

About the Role:
As a Senior Systems Administrator, you'll be responsible for ensuring the seamless operation and availability of our internal infrastructure, client systems, and cloud services (AWS, Azure). Your expertise will support day-to-day operations, data centre management, and cloud deployments while proactively addressing technical challenges and implementing innovative solutions. This role is key to maintaining the stability, scalability, and security of our systems and processes.

Key Responsibilities:
Oversee the day-to-day operations of both new and existing infrastructure, ensuring optimal system performance. Troubleshoot and resolve technical issues across software, hardware, and networking systems. Create and maintain accurate system administration documentation and procedural workflows. Research and evaluate emerging technologies to improve business operations. Collaborate closely with support, DevOps, and Project teams to align with business needs. Develop repeatable solutions using best practices, such as change and version control.

Required Experience:
5+ years of experience in Systems Administration.
Strong Linux and Windows administration skills.
LDAP + Active Directory management.
Experience with Scripting (Bash, Python, PowerShell).
Proven experience with security practices in Firewall hardware and software.
Strong networking experience.
3+ years supporting PCI/DSS environments.

Desirable Experience:
Familiarity with Ansible or similar automation tools.
Knowledge of industry security practices.
Exposure to CI/CD tools (eg, BitBucket, Jenkins).
Experience with database administration (MySQL, MariaDB).
Understanding of DevOps principles and Agile methodologies.