IT Infrastructure Specialist (Linux)

Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. 

IT Infrastructure Specialist

Location- Gurgaon/ Bangalore, India

Job Level- S2 Core

Employement Type- Fulltime Employee

Why we need this role

We are seeking a Linux Specialist to act as a technical subject matter expert within the Linux Engineering team. This role is responsible for the design, implementation, support, and optimisation of a large-scale Linux estate supporting critical business applications.

You will work across approximately 4000 Linux systems, driving automation, standardisation, security, and reliability, while contributing to platform strategy and continuous improvement. The role requires deep technical expertise, strong troubleshooting capability, and effective cross-team collaboration.

What you will do

Key Responsibilities for this role are:-

1. Platform Engineering & Ownership

• Act as the technical authority for Linux platforms (RHEL, CentOS, Ubuntu)
• Design and deliver secure, scalable, and highly available infrastructure solutions
• Contribute to and execute the Linux platform roadmap

2. Automation & Efficiency

• Drive automation-first operations using Ansible and scripting
• Implement Infrastructure as Code (IaC) and configuration standards
• Deliver scalable efficiency improvements across the estate

3. Operations & Reliability

• Lead complex incident resolution and root cause analysis
• Manage patching, configuration, and lifecycle activities
• Improve performance, observability, and system resilience

4. Security & Compliance

• Apply CIS hardening and ISO27001-aligned controls
• Embed secure-by-design principles into engineering
• Support audits and maintain compliance artefacts

5. Core Services (DNS & Identity)

• Support and enhance DNS and LDAP services (Red Hat / Oracle)
• Contribute to enterprise identity integration and authentication

6. Collaboration & Documentation

• Produce high-quality technical documentation and runbooks
• Work closely with architecture, security, and application teams
• Provide technical leadership and mentoring

7. Operational Support

• Participate in an on-call rota for priority incident support

What we're looking for

Required Skills & Experience

• 5+ years’ experience in enterprise Linux administration
• Strong expertise in:
• Red Hat, CentOS, Ubuntu
• Ansible automation at scale
• DNS and LDAP (Red Hat / Oracle)
• Experience with:
• High availability and disaster recovery solutions
• Security frameworks (ISO 27001, CIS benchmarks)
• Scripting (Bash, Python) and IaC principles
• Proven ability to manage large-scale environments (1000+ servers)
• Strong problem-solving, troubleshooting, and communication skills

What we offer you:

Looking to make a mark?

At Colt, you’ll make a difference. Because around here, we empower people. We don’t tell you what to do.

Instead, we employ people we trust, who come together across the globe to create intelligent solutions.

Our global teams are full of ambitious, driven people, all working together towards one shared purpose: to put the power of the digital universe in the hands of our customers wherever, whenever and however they want.

We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.

Diversity and inclusion

• Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, you’ll be encouraged to be yourself because we believe that’s what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.

Most recently we have:

• Signed the UN Women Empowerment Principles which guide our Gender Action Plan
• Trained 60 (and growing) Colties to be Mental Health First Aiders
• Please speak with a member of our recruitment team if you require adjustments to our recruitment process to support you. For more information about our Inclusion and Diversity agenda, visit our DEI pages.

Benefits

Our benefits support you through all parts of life, for both physical and mental health.

• Flexible working hours and the option to work from home.
• Extensive induction program with experienced mentors and buddies.
• Opportunities for further development and educational opportunities.
• Global Family Leave Policy.
• Employee Assistance Program.
• Internal inclusion & diversity employee networks.

A global network

• When you join Colt you become part of our global network. We are proud of our colleagues and the stories and experience they bring – take a look at ‘Our People’ site including our Empowered Women in Tech.