Unix/Linux Engineer

About Atos Group

Atos Group is a global leader in digital transformation with c. 70,000 employees and annual revenue of c. € 10 billion, operating in 67 countries under two brands — Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris.

The purpose of Atos is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space.

As a Unix/Linux Engineer, you will join the Infrastructure Operations team, supporting and evolving enterprise AIX and Linux platforms. You’ll play a key role in ensuring high availability, performance, and security across critical systems, while contributing to automation and modernization initiatives.

Working closely with engineers, developers, and customers, you will design, implement, and support robust infrastructure solutions, helping deliver stable and resilient platforms for business-critical applications across the UK&I.

The core activities include:

Platform Management & Administration

• Install, configure, and maintain AIX and Linux systems (RHEL, SUSE, Ubuntu) systems.


• Manage system updates, patches, and lifecycle activities; perform system performance tuning, troubleshooting, and optimisation.


• Monitor system health, availability, and capacity using enterprise tools; manage user access and system reporting.

Infrastructure Operations

• Maintain filesystems, volume management, and storage integration (e.g., LVM, ASM, SAN).


• Administer logical partitions (LPARs), VIOS, and PowerVM for AIX environments.


• Build and support server environments for on‑prem and/or cloud-hosted workloads; provide 2nd/3rd line support for incidents and problems within SLAs.

Automation & Scripting

• Develop and maintain automation scripts using Shell, Bash, Python, or Ansible.


• Support configuration management, infrastructure-as-code, and system standardisation.


• Security & Compliance; maintain OS security baselines, hardening, patching, and vulnerability remediation; support audit readiness and compliance frameworks (ISO27001, PCI-DSS, etc.).

Documentation & Process

• Produce and maintain technical documentation, system designs, and procedures.


• Contribute to continuous improvement within the infrastructure function.

Project Involvement

• Participate in infrastructure upgrades, migrations, and transformation initiatives.


• Work closely with cross-functional teams (network, storage, application, cloud).

Out of hours Requirements

• Take part in an on‑call rota as required.


• Provide occasional overtime support during planned or unplanned work.

Technical Skills

• Strong hands-on experience with IBM AIX administration, including:

PowerVM, LPAR/VIOS management

NIM server administration

AIX patching and performance tuning

• Solid experience with Linux (RHEL preferred, but other enterprise distros accepted).


• Proficiency in shell scripting (KSH, Bash) and automation (Ansible or similar).


• Understanding of:

TCP/IP networking fundamentals

Storage technologies (SAN, NAS, multipathing)

Backup/restore tools and DR procedures

• Experience working within enterprise server environments.

Education & Qualifications

• Degree in Computer Science, Engineering, or related field (or equivalent experience).


• Professional certifications preferred but not required.

Security Clearance:

• SC security clearance is required.

Benefits:

• Pension Scheme - contributions matched up to 10%


• Private medical cover


• Income Protection


• Life Assurance


• 25 days paid leave + National Holidays


• Flex benefits program

Diversity, Equity & Inclusion

Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all. As a Disability Confident employer, we encourage applications from all applicants, especially, differently abled applicants. We aim to ensure that those who meet the minimum criteria for this position will be offered an interview. We are committed and willing to making reasonable adjustments to the application and assessment process to accommodate your needs.

We are also a care leaver-friendly employer. If you require additional support with your application, please contact our recruiter or send an email to our dedicated mailbox - [email protected]