Senior System Administrator

Title: Senior System Administrator

Banking Domain,

Application/Product Development and Infrastructure Support (Linux, Java Application Servers, AWS, DevOps)

Work Location: Chennai, India

Experience Required: 10+ years, with long-term enterprise project experience

Experienced Senior System Administrator to replace a long-serving member of our critical Banking domain application support and development program. This role is key to ensuring the stability, security, and performance of our application environments, with a strong emphasis on collaboration between Development, InfoSec, IT Infrastructure, and DBA teams.

The ideal candidate will have extensive expertise in Linux/Windows server administration, AWS Cloud, Java Stack application servers, and enterprise security practices in a regulated, highly secure environment.

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Key Responsibilities

• Server & Infrastructure Management
• Administer and maintain Linux servers (RedHat Enterprise Linux and other variants) and Windows servers.
• Manage application servers including IIS, WebSphere, and Tomcat (8/9/10).
• Apply and manage Java platform and application server patches.
• Maintain network devices, firewalls, appliances, and WAF configurations.
• Cloud & Automation
• Manage AWS Cloud infrastructure (EC2, S3, RDS, IAM, VPC, CloudWatch) and exposure to Azure environments.
• Implement and manage Infrastructure as Code (IaC) using Ansible and Terraform.
• Administer containerized workloads using Docker and Kubernetes.
• Application & DevOps Support
• Support Java Stack applications in development and production environments.
• Deploy applications across environments, ensuring security and compliance requirements are met.
• Work with CI/CD tools such as Jenkins, Azure DevOps, GitLab, and GitHub for build and deployment automation.
• Integrate and maintain observability tools for performance and health monitoring.
• Security & Compliance
• Collaborate with Development and Information Security teams to implement and enforce secure practices.
• Manage vulnerability remediation, patch cycles, and security hardening.
• Ensure compliance with banking regulatory standards and ITIL processes (Incident, Problem, Change Management).
• Resilience & Business Continuity
• Participate in Disaster Recovery (DR) planning, testing, and execution.
• Ensure high availability of business-critical systems.
• Maintain readiness for business continuity scenarios.

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Required Skills & Qualifications

• 12+ years of IT System Administration experience.
• Proven track record of 10+ years in large-scale enterprise environments, ideally in Banking/Financial Services.
• Strong experience with Linux (RHEL) and Windows Server administration.
• Hands-on experience with AWS Cloud (Azure exposure is a plus).
• Strong background in Java Stack application support and deployment.
• Application server expertise in Tomcat, WebSphere, IIS.
• Skilled in Infrastructure as Code (Ansible, Terraform).
• Familiarity with Observability/Monitoring tools (e.g., Prometheus, Grafana, ELK stack).
• Knowledge of containerization (Docker, Kubernetes).
• DevOps toolchain experience: Jenkins, Azure DevOps, GitLab, GitHub.
• Strong Information Security process and tooling knowledge.
• Familiarity with firewall appliances, WAF, and secure network configurations.
• Understanding of ITIL processes and enterprise change control.
• Understand Info Sec practices

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Preferred Certifications

• AWS Certified SysOps Administrator or Solutions Architect.
• Red Hat Certified Engineer (RHCE) or Microsoft Certified: Windows Server Administration.
• Oracle Certified Professional (for database fundamentals).
• ITIL Foundation or higher.
• Kubernetes Administrator (CKA) or Docker Certified Associate.

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Soft Skills

• Strong collaboration skills to work across Development, DBA, Infra, and Security teams.
• Analytical thinking and problem-solving ability in high-pressure, high-security environments.
• Excellent documentation and communication skills.
• Proactive, detail-oriented, and committed to service excellence.