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*
Sobre a Cognizant
Cognizant (NASDAQ: CTSH) é uma construtora de IA e fornecedora de serviços de tecnologia, criando a ponte entre o investimento em IA e o valor para as empresas por meio do desenvolvimento de soluções de IA completas para nossos clientes. Nossa profunda experiência em setores, processos e engenharia nos permite incorporar o contexto único de cada organização em sistemas tecnológicos que potencializam a capacidade humana, geram resultados tangíveis e mantêm empresas globais à frente em um mundo em rápida transformação. Saiba mais em cognizant.ai ou @cognizant.
A Cognizant é uma empregadora que investe em equidade. Sua candidatura não será pautada em raça, cor, gênero, sexualidade, credo, origem, deficiência, gravidez ou qualquer outra característica protegida pelas leis brasileiras.
Informações adicionais de emprego
Os candidatos podem ser obrigados a comparecer a entrevistas presenciais ou por videoconferência. Além disso, os candidatos podem ser obrigados a apresentar seu documento de identificação emitido pelo estado ou governo atual durante cada entrevista.
Embora nosso sistema permita a candidatura em todos os idiomas, o(s) idioma(s) e o(s) nível(is) de proficiência exigidos para o trabalho variam. No entanto, é necessário um nível básico de inglês para fins de comunicação em toda a empresa.
A Cognizant é uma empregadora que investe em equidade. Sua candidatura não será pautada em raça, cor, gênero, sexualidade, credo, origem, deficiência, gravidez ou qualquer outra característica protegida pelas leis brasileiras.
Se você tem uma deficiência que requer adaptações razoáveis para procurar uma vaga de emprego ou enviar uma candidatura, envie um e-mail para [email protected] com sua solicitação e informações de contato.
