Senior Unix Engineer

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
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.
Responsibilities
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
Certifications & Professional Qualifications
Essential
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.