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3rd Line / Systems Administrator

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OSCAR ASSOCIATES (UK) LIMITED2 days ago Be among the first 25 applicantsJoin to apply for the

3rd Line / Systems Administrator

role at

OSCAR ASSOCIATES (UK) LIMITEDGet AI-powered advice on this job and more exclusive features.Salary

£40,000 - £45,000 DOE + On-Call Allowance + Bonus + BenefitsSalary

£40,000 - £45,000 DOE + On-Call Allowance + Bonus + Benefits

About The Role

We''re looking for a Third Line Systems Administrator to join a dynamic managed hosting provider, acting as the final point of escalation for complex infrastructure issues. You''ll play a key part in improving, automating, and optimising core systems - making a genuine impact in a business that values technical ownership and continuous evolution.

This is a hands-on, senior-level role suited to engineers with strong experience in Linux, VMware, Cisco, and infrastructure automation, ideally in a managed services or hosting environment.

Key Responsibilities

Serve as the final escalation point for critical infrastructure incidents and issuesAdminister and maintain Linux systems (RedHat, CentOS, Ubuntu)Manage virtualisation environments (VMware vSphere, ESXi, vCenter)Support and configure Cisco network infrastructure (routing, switching, firewalls)Drive improvements through automation (Bash, Python, Ansible, Puppet)Lead infrastructure upgrade and optimisation projectsWork closely with internal teams and clients to ensure uptime and performanceContribute to disaster recovery planning, monitoring, and best practice documentationParticipate in an on-call rota

What We''re Looking For

Proven 3rd line / senior systems admin experience in a hosting or MSP settingDeep understanding of Linux server administrationStrong VMware virtualisation skillsCisco networking knowledge (ideally CCNA or equivalent)Experience automating infrastructure with scripting or config management toolsAbility to take ownership, troubleshoot end-to-end, and drive real change

Desirable Extras

Public cloud experience (AWS, Azure, OpenStack)Storage (SAN/NAS) and backup tools (Veeam, Rubrik)Monitoring platforms (Zabbix, PRTG, Nagios)

Why Join?

Be the go-to technical expert in a close-knit, high-performing teamImprove real-world systems, not just maintain themClear progression opportunities into architecture or DevOps pathwaysFlexible hybrid working and supportive leadershipFunded certifications and a strong focus on your technical development

Apply today

to become the engineer that makes a real difference or reach out for a confidential chat.

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LNKD1_UKTJSeniority level

Seniority level Mid-Senior levelEmployment type

Employment type Full-timeJob function

Job function Information TechnologyIndustries Data Infrastructure and AnalyticsReferrals increase your chances of interviewing at OSCAR ASSOCIATES (UK) LIMITED by 2xSign in to set job alerts for “System Administrator” roles.

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