Linux Specialist - L1

Brennan. Where true performance thrives.

At Brennan, we believe that how technology is delivered is every bit as important as what the technology is. We focus on creating real and relevant value for customers with solutions that fit their specific needs and always reflect their true interests.

It’s a claim backed by our True Performance System - a way of working engineered to get us closer, and deliver better, for our customers and their actual experience of technology.

Why join Brennan

True performance for our customers starts with a true belief in our people.

It’s why we’ve structured our business to help our teams, and their talents, shine bright. It's why we’ve created a workplace where people of all backgrounds, beliefs and experiences are welcomed and empowered. And it’s why we’ve built an organization where real innovation makes a genuine impact and generates true rewards for our team members.

True rewards

In addition to competitive remuneration, Brennan offers extensive benefits, including:

• Training and certification bonuses
• Culture Awards that recognize excellence
• Brennan Daredevils - our annual, all-expenses paid trip awarded to our top performers and outstanding contributors
• Vibrant, fun social activities
• Discounted hardware and software
• An environment that embraces learning and development

The Role:

Due to the recent acquisition of a key enterprise account, an important role has been identified for the system administration and management of around two hundred linux operating systems, across multiple flavours and versions of linux distributions. We are looking for a n engineer who is comfortable with every aspect of system administration from file, resource and application management, through backup and patching in mission critical enterprise environments

Role Responsibilities

• Act as the primary Linux Administrator taking ownership of the customer’s Linux infrastructure and serving as the final escalation point for complex issues.
• Manage and maintain a large Linux estate of 100+ servers across multiple distributions, ensuring stability, availability and performance.
• Perform Linux OS and application patching, upgrades, package management and security maintenance across the environment.
• Troubleshoot complex infrastructure and application issues involving CPU, memory, disk latency, networking, filesystems and n-tier applications such as Oracle and SAP HANA.
• Work closely with SAN, Storage and Backup teams to maintain a healthy and highly available Linux environment.
• Conduct detailed root cause analysis, eliminate recurring issues and continuously improve and automate Linux administration activities.

Key Competencies and Qualifications Required:

• 3+ years of hands-on Linux System Administration experience across multiple distributions such as RHEL, Ubuntu or SUSE.
• Strong experience managing 100+ Linux servers, including filesystems, partitioning, LVM, storage and LDAP/Windows integration.
• Advanced Linux troubleshooting skills covering CPU, memory, disk, network, kernel/resource and application-related issues.
• Strong Bash/Shell scripting skills, with experience using automation/configuration tools such as Ansible or Puppet.
• Experience with Linux patching, package management (YUM/APT), monitoring tools such as Nagios, and backup platforms such as Avamar.
• Strong understanding of Linux security, high availability, RCA and enterprise applications, with relevant Linux/industry certifications preferred.

Brennan is an equal opportunity employer.