Linux Platform Engineer (3rd Line)

We are Kocho
Kocho is the original Microsoft identity‑centric security partner, delivering transformational services for UK organisations. We secure every identity first - then use that foundation to strengthen security, modernise cloud and apps, and keep everything running through leading managed services, and managed security operations.
You’ll be joining a team that’s trusted by organisations to deliver at scale. As an eight‑time Microsoft Partner of the Year winner and one Microsoft’s most decorated UK partners.
Our work speaks for itself:
We’ve helped BT Group build multi‑brand customer authentication at scale (including migration of 25 million accounts).
We supported Dojo’s cloud‑first identity modernisation (achieving 65% reduction in first‑line support tickets and £80k+ annual savings).
And we enabled Hallo Healthcare’s secure cloud independence (migrating 17,000 identities and 180+ applications securely to zero trust architecture with Entra).
Our head office is in the heart of London, with additional offices in Cardiff and Cape Town, providing a comfortable working environment with flexible collaboration spaces. And we’re guided by our core values: Do What’s Right, Think Greater, and Better Together.
Kocho is an equal opportunities employer. We make recruitment decisions based on qualifications, skill set and experiences We consider all suitable candidates regardless of their age, sex, gender reassignment, race, pregnancy and maternity, religion or belief, marital status, disability or sexual orientation. This is mindset aligns with our company values as we understand that we are Better Together.
Key Responsibilities
As a Senior Linux Infrastructure Engineer, you will be a critical part of a dedicated team providing 3rd line support for a large UK-based client. You will be responsible for the advanced management, maintenance, and troubleshooting of Linux-based platforms and infrastructure.
Your main responsibilities will include:
Providing expert, 3rd line technical support and advanced troubleshooting for complex incidents and problems in a Linux environment.
Collaborating with the Service Integrator, 3rd parties, and other specialists to ensure the stability, availability, performance, and security of services through a best-practice approach.
Leading the planning, documentation, and execution of change and release activities, including patch and upgrade management.
Maintaining and enhancing configuration data, ensuring its accuracy and currency.
Acting as an escalation point for complex incidents and issues, driving them to resolution and communicating effectively with all stakeholders.
Proactively identifying, managing, and mitigating technical risks and issues.
Contributing to the development and maintenance of high-quality technical documentation.
Adhering to and championing ITIL-based policies and practices within our service management framework.
Person Specification
This role requires a highly skilled and experienced engineer who thrives on solving complex technical challenges.
Key Performance Indicators:
Successfully resolving high-priority and complex incidents within contracted SLAs.
Receiving positive feedback on the quality and effectiveness of your technical support from clients and internal teams.
Ensuring technical documentation is comprehensive, accurate, and kept up-to-date.
Continuously expanding your technical knowledge and skill set to stay ahead of industry trends.
Skills and Experience:
A degree in Computer Science or a related field is preferred.
5 years experience as a 3rd Line Linux Engineer with proven, advanced troubleshooting skills.
Expert-level knowledge of Linux server environments, specifically Ubuntu and Red Hat.
Proficiency in scripting and automation using PowerShell and Bash.
Understanding of IT network principles and troubleshooting network-related issues.
Experience with Azure infrastructure and services
Strong experience with configuration management and monitoring tools, such as N-able.
Excellent analytical and problem-solving skills, with the ability to take full ownership of incidents from initial report to final resolution.
A positive, enthusiastic, and supportive attitude, with strong collaboration skills in a team environment.
Exceptional verbal and written communication skills, with the ability to articulate complex technical information clearly.
Preferred Qualifications:
Relevant certifications in Linux administration (e.g., RHCSA, LPIC).
Microsoft Azure certifications (e.g., AZ-900).

Employment type
Full-Time

Work arrangement
No