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*
关于高知特 (Cognizant)
高知特(Cognizant)（纳斯达克代码：CTSH）作为一家AI Builder和相关技术服务提供商，致力于通过打造全栈AI解决方案，帮助企业将人工智能投资转化为实际价值。公司凭借深厚的行业经验、流程优化和工程技术专长，将企业独特的业务场景融入科技系统，赋能组织释放人才潜能，推动切实成果，并帮助全球企业在瞬息万变的环境中保持领先。如需了解更多详情，敬请访问 cognizant.ai 或关注@cognizant。
补充雇佣信息
薪酬信息截至本职位发布之日为准。Cognizant 保留在适用法律允许的范围内随时修改该信息的权利。
申请人可能需要通过现场面试或视频会议的方式参加面试。此外，候选人在每次面试时可能需要出示其当前所在州或政府签发的有效身份证件。
Cognizant 是一家提供平等就业机会的雇主。在招聘过程中，您的申请和候选资格不会因种族、肤色、性别、宗教、信仰、性取向、性别认同、国籍、残疾、遗传信息、怀孕、退伍军人身份或任何其他受联邦、州或地方法律保护的特征而受到影响。
