_{17th June, 2025}

Linux Specialist

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 organisation 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 recognise excellence 
• Brennan Daredevils – our annual, all-expenses paid trip awarded to our top performers and outstanding contributors 
• Vibrant, fun social activities.
• 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
The key focus of this role will be maintaining the health of this estate, in conjunction with the client’s application teams.
  
You will be primary engineer ; the “goto” person for the Linux infrastructure working in conjunction with the Infrastructure (SAN & Backup) teams to deliver a healthy , highly available and securely patched Linux environment for the customer.
You will have significant experience across multiple Linux distributions and understand the importance of maintaining a health unix operating system environment to support applications such as Oracle and SAP HANA.  You will firstly familiarise yourself with the estate ,  identify and eliminate any repeat problems using high quality root cause investigation, before looking to improve the quality and ease of administration of the estate over time.
You will be comfortable as an individual contributor with primary responsibility for an estate, but also an integral team player within the wider Aurizon team, focused on delivering brilliant customer outcomes with consistent quality work.
 
Key Competencies and Qualifications required
Essential

• Minimum of 8 years Linux System Administration experience across multiple distributions
• Experience of primary responsibility for a Linux estate of over 100 machines
• Experience with core OSS tools:
• Application packaging and deployment across multiple Linux distributions (yum, apt, pkg)
• O/S and application patching & upgrades across multiple distribution systems
• Monitoring platforms (Nagios or similar)
• Mainstream and o/s Backup platforms (tar and commercial e.g Avamar)
• Strong shell scripting (bash / sh) usable to solve complex tasks
• Advanced troubleshooting experience
• Experience of virtual and physical SAN storage and implications for administering the OSS
• Handling kernel/resource troubleshooting (CPU_WAIT, Disk latency, memory usage, network issues)
• Troubleshooting enterprise integrated applications (n-tier, gateway web/app/db etc).
• Linux System Administration skills, specifically:
• Local & Network Filesystems: (provisioning, partitioning resizing , repairing)
• LDAP/Windows Integration
• Experience in one mainstream configuration management/imaging platform (puppet, ansible etc)
• Experience is acting as final escalation point for complex/high impact issues
• Appreciation of core security concepts (deny by default, least privilege)
• Root cause and problem analysis
• Industry based certifications

Desirable
The following Competencies and Experience would be an advantage in this role;    

• Oracle Linux
• SAP HANA clusters
• Programming skills in one or more languages (python, php, ruby)_
• Working knowledge of ITIL concepts and methodologies
• Experience with Unix based Disaster Recovery solutions
• Suitable SQL skills for querying databases (e.g. understanding joins)

Brennan is an equal opportunity employer.

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