About the group:
Cognizant’s Cloud, Infrastructure, and Security Services Practice (CIS), is all about accepting digital transformation by driving core modernization holistically across layers. We help customers transform infrastructure and workplace to meet the constantly evolving needs of the digital era. Our broad approach delivers key results for our customers by achieving cloud driven modernization and workplace and operational transformation to own the business in a secure environment.
*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*
Job Title: Senior Linux Administrator
Location: Remote
Job Summary
We are seeking an experienced Senior Linux Administrator with strong expertise in Red Hat Enterprise Linux (RHEL), VMware ESXi/vSphere, Ansible Automation Platform (AAP), and Patch Automation. The candidate will be responsible for managing enterprise Linux infrastructure, VMware virtual environments, vulnerability remediation, OS patching, automation initiatives, and platform reliability.
The ideal candidate should possess deep hands-on experience in Linux administration, VMware virtualization, infrastructure automation, security compliance, and automated patch management using Ansible.
Key Responsibilities
Linux Administration
• Administer and support large-scale Linux environments (RHEL, CentOS, Rocky Linux, Oracle Linux).
• Perform OS installation, upgrades, migrations, and lifecycle management.
• Configure and maintain user management, storage, LVM, file systems, NFS, and security policies.
• Monitor server performance, capacity planning, and system health.
• Troubleshoot complex OS, kernel, filesystem, and performance issues.
VMware ESXi Administration
• Manage VMware vSphere, ESXi hosts, clusters, vCenter, and virtual machines.
• Perform VM provisioning, resource optimization, snapshot management, and host maintenance.
• Support ESXi upgrades, patching, and cluster maintenance activities.
• Collaborate with storage and network teams for virtualization solutions.
Ansible Automation
• Develop and maintain Ansible Playbooks, Roles, and Inventories.
• Build Infrastructure as Code (IaC) solutions for Linux administration tasks.
• Automate:
o Server provisioning
o Configuration management
o User administration
o Compliance validation
o Health checks
o Patch deployment
• Utilize Ansible Tower/AWX/AAP for scheduling and orchestration.
Patch Automation & Vulnerability Management
• Design and implement automated Linux patching solutions using Ansible.
• Execute monthly and emergency patching activities.
• Manage patch compliance reporting and audit requirements.
• Perform pre-checks, patch deployment, reboot coordination, validation, and reporting.
• Remediate security vulnerabilities identified through Tenable, Qualys, Rapid7, or other scanning tools.
• Support CIS benchmark hardening and security compliance initiatives.
Security & Compliance
• Perform Linux hardening based on CIS standards.
• Support SOX, PCI-DSS, HIPAA, and corporate security compliance requirements.
• Conduct vulnerability assessments and remediation activities.
• Manage SSH key authentication, certificate renewals, and access controls.
Automation & Scripting
• Create Bash, Shell, Python, or Ansible-based automation solutions.
• Automate recurring operational activities and reduce manual interventions.
• Integrate automation workflows with ServiceNow, Jenkins, GitLab, or APIs.
Incident & Problem Management
• Lead troubleshooting and root cause analysis for critical incidents.
• Participate in change management, release management, and DR activities.
• Provide L3/L4 infrastructure support.
Required Skills
Operating Systems
• Red Hat Enterprise Linux (RHEL)
• CentOS
• Rocky Linux
• Oracle Linux
Virtualization
• VMware ESXi
• VMware vSphere
• vCenter Administration
Automation
• Ansible
• Ansible Tower / AWX / AAP
• YAML Playbooks
Scripting
• Bash Shell
• Python
Patching Tools
• Red Hat Satellite
• Ansible Automation Platform
• Patch Management Frameworks
Security
• Vulnerability Management
• CIS Hardening
• CVE Remediation
• Security Compliance
Preferred Skills
• OpenShift / Kubernetes
• Terraform
• Git/GitLab
• Jenkins
• ServiceNow Integration
• Cloud Platforms (AWS/Azure)
• Monitoring Tools (SolarWinds, Nagios, Prometheus)
Certifications (Preferred)
• RHCSA / RHCE
• VMware VCP
• Red Hat Ansible Automation Certification
• AWS/Azure Certification
Soft Skills
• Strong troubleshooting and problem-solving abilities.
• Excellent communication and stakeholder management.
• Ability to drive automation initiatives and mentor junior administrators.
• Experience working in enterprise/global delivery environments.
Nice-to-have for Senior-Level Candidates
• Experience managing 500+ Linux servers
• Enterprise patch automation at scale
• VMware cluster patching automation
• Integration of Ansible with ServiceNow and CI/CD pipelines
• Infrastructure modernization and transformation projects
Compensation: We are offering between $94,000 – $109,000. Applications will be accepted until July 24, 2026.Cognizant will only consider applicants for this position who are legally authorized to work in Canada without requiring employer sponsorship, now or at any time in the future.
This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans.
Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*
À propos de Cognizant
Cognizant (NASDAQ : CTSH) est un AI Builder et une entreprise de services numériques (ESN) élaborant des solutions complètes d’IA maximisant les investissements pour des résultats concrets. Sa profonde expertise des métiers, des processus et des technologies lui permet d’intégrer dans les systèmes technologiques le contexte unique de chaque organisation de l’ingénierie à la production à l’échelle. Son objectif : améliorer l’efficacité des équipes, créer de la valeur et permettre aux grandes entreprises de rester performantes dans un monde qui évolue rapidement. Pour en savoir plus : cognizant.ai ou @cognizant.
Renseignments suppplémentaires sur l'emploi
Les informations sur la rémunération sont exactes à la date de publication. Cognizant se réserve le droit de modifier ces informations à tout moment, conformément aux lois applicables.
Les exigences linguistiques varient selon les postes, mais nous demandons à tous les candidats d’avoir une connaissance de base de l’anglais afin de faciliter les communications internes à l’échelle de l’entreprise. Pour les postes basés au Québec, une maîtrise de l’anglais est requise puisque vous fournirez des services et collaborerez avec des parties prenantes situées hors de la province, qui ne parlent pas nécessairement le français.
Cognizant est un employeur souscrivant au principe de l’égalité d’accès à l’emploi. Votre candidature et votre dossier ne seront pas examinés en fonction de la race, de la couleur, du sexe, de la religion, des croyances, de l'orientation sexuelle, de l'identité de genre, de l'origine nationale, du handicap, de l'information génétique, de la grossesse, du statut d'ancien combattant ou de toute autre caractéristique protégée telle que décrite par les lois fédérales, provinciales ou locales.
Si vous avez un handicap qui nécessite un aménagement raisonnable pour rechercher une offre d'emploi ou poser une candidature, envoyiez un courriel à [email protected] avec votre demande et vos coordonnées.
