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*
コグニザントについて
コグニザント（NASDAQ: CTSH）は、AI Builderおよびテクノロジーサービスプロバイダーとして、お客様にフルスタックのAIソリューションを構築することで、AI投資と企業価値を結ぶ架け橋となっています。業界、ビジネスプロセス、エンジニアリングに関する当社の深い専門知識を活かし、組織固有のビジネス環境をテクノロジー・システムに組み込みます。これにより、人間の可能性を最大限に引き出し、確かな成果を実現するとともに、急速に変化する世界においてグローバル企業が常に一歩先を行くための支援を行っています。 詳細については、cognizant.ai をご覧ください。
雇用に関する追加情報
本募集に記載されている報酬情報は、掲載日時点で正確なものです。Cognizantは、適用される法令に従い、いつでも本情報を変更する権利を留保します。
応募者は、対面またはビデオ会議による面接への参加を求められる場合があります。また、各面接の際に、現在有効な州政府または政府発行の身分証明書の提示を求められる場合があります。
Cognizantは機会均等雇用主です。応募および選考において、人種、肌の色、性別、宗教、信条、性的指向、性自認、国籍、障がい、遺伝情報、妊娠、退役軍人の地位、その他連邦法・州法・地方自治体の法律により保護されるいかなる特性に基づく差別も行いません。
