Senior Unix Engineer

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Title And Summary

Senior Unix Engineer

Overview

As a Unix Platform System Engineer (Ansible-focused), you will be responsible for the build, automation, and continuous improvement of Vocalink Core Unix platforms (RedHat, OEL, Solaris).

The role is centred on infrastructure automation, configuration management, and Infrastructure as Code (IaC) using tools such as Ansible, and Git, reducing manual effort and improving consistency, scalability, and resilience.

You will lead the transition from traditional system administration to automated, self-service platform engineering, ensuring all services meet SLA and availability targets while driving operational excellence.

Design, develop, and maintain Ansible playbooks, roles, and automation frameworks to manage Unix platforms at scale

Build and manage Infrastructure as Code (IaC) pipelines for provisioning, configuration, and lifecycle management

Standardise and automate Unix builds, patching, upgrades, and compliance enforcement

Integrate automation with tools such as Git, CI/CD pipelines, and Service Management platforms

Lead platform modernisation initiatives, moving from manual/legacy processes to automated solutions

Collaborate with development, platform, and security teams to deliver automated, reusable service offerings

Develop and maintain technical documentation, automation standards, and reusable patterns

Analyse and resolve complex platform issues, leveraging automation to prevent recurrence

Support capacity planning, performance optimisation, and cost efficiency through automation insights

Partner with 3rd parties and internal teams to align with industry best practices in DevOps and platform engineering

Contribute to continuous improvement of Agile delivery practices (Scrum/Kanban)

Experience

Strong experience delivering automation-led platform engineering initiatives, leading workstreams or domains

Proven track record implementing Ansible at scale across Unix/Linux estates

Experience building end-to-end automated pipelines (build, config, patch, deploy)

Hands-on experience with Infrastructure as Code and GitOps methodologies

Experience transforming legacy/manual operational processes into automated workflows

Ability to define automation strategy, standards, and reusable frameworks

Experience acting as a technical authority for Unix automation and platform engineering

Strong stakeholder engagement across engineering, operations, and leadership teams

Experience driving process improvement, efficiency gains, and cost optimisation through automation

Demonstrated ability to resolve complex platform issues and implement preventative automation solutions

Technical and Professional Skills

Core Platform Skills

RedHat / OEL / Solaris – Advanced

Unix/Linux system administration – Advanced

Patching & Lifecycle Automation – Advanced

Networking (TCP/IP, DNS, SSH, LDAP) – Advanced

Automation & DevOps (Primary Focus)

Ansible (Playbooks, Roles, Collections, AWX/Tower) – Expert

Infrastructure as Code (Ansible) – Advanced

Git / GitOps workflows – Advanced

Python / Bash scripting – Advanced

Event-driven automation – Intermediate

Platform Engineering & Tooling

Red Hat Satellite / patch orchestration – Advanced

Monitoring & Observability (Splunk, logs integration) – Intermediate

Vulnerability & compliance tools (Qualys, CIS controls) – Intermediate

Infrastructure & Architecture Awareness

Compute & virtualisation awareness (VMware, OVM) – Advanced

Storage & backup technologies – Intermediate

Cloud & hybrid infrastructure awareness – Intermediate/Advanced

Infrastructure architecture & networking – Advanced

Operating Model & Practices

ITIL Service Management – Strong working knowledge

Agile delivery (Scrum/Kanban) – Intermediate

Atlassian (Jira, Confluence) – Intermediate

Essential

Certifications & Professional Qualifications

Red Hat Certified Engineer (RHCE)

Red Hat Specialist in Ansible Automation

Preferred

Red Hat Specialist in Security

RH403 – Red Hat Satellite Administration

VMware Certified Professional (VCP)

Desirable / Good to Have

HashiCorp Terraform Associate

AWS Certified Solutions Architect – Associate

Corporate Security Responsibility

All Activities Involving Access To Mastercard Assets, Information, And Networks Comes With An Inherent Risk To The Organization And, Therefore, It Is Expected That Every Person Working For, Or On Behalf Of, Mastercard Is Responsible For Information Security And Must:

• Abide by Mastercard’s security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.