System Administrator

3 days ago

Singapore ELLIOTT MOSS CONSULTING PTE. LTD. Full time

**Key Responsibilities**:

- **Environment Build & Configuration**
Install, configure, and maintain **Tomcat**instances (service wrappers, JVM settings, thread pools, virtual hosts, context paths, HTTP/HTTPS connectors).
Configure **WebLogic**domains, admin/managed servers, clusters, data sources (JDBC), JMS, connection pools, and node managers.
Implement **SSL/TLS**, manage keystores/certificates, and enforce secure cipher suites and protocols.
- **Deployment & Release Support**
Automate repeatable tasks (startup/shutdown, deployments, health checks).
- **Operations, Monitoring & Troubleshooting**
Integrate and tune alerts with tools such as **Splunk**(logging/observability) and **Tenable**(vulnerability posture).
Diagnose and resolve incidents related to JVM performance, memory leaks, thread contention, connection pooling, and deployment failures.
Implement and maintain **high availability & load balancing**configurations.
- **Security & Compliance**
Remediate vulnerabilities; maintain configuration baselines aligned to security standards and hardening guides.
Manage certificate renewals and secrets/keystore hygiene.
- **Platform & Infrastructure Administration**
Support **Windows Server**services (WSUS, basic file/NTFS permissions) and **Linux**administration for middleware hosts.
**Active Directory**basics: user/groups, GPO awareness, DNS entries relevant to app hosting.
Manage **Symantec Endpoint Protection Manager (SEPM)**policies on servers.
- **DevOps & Automation**
Use **GitLab (CI/CD)**for pipeline-driven deployments where applicable.
Leverage **Docker**for packaging middleware tools/utilities; use **Terraform**for IaC in supported environments.
Contribute to runbooks, SOPs, and environment documentation.
- **Service Management**
Handle user requests and operational queries within SLAs.
Participate in problem reviews/RCAs and drive continual service improvement.

**Required Qualifications & Skills**:

- 3-6 years’ hands-on experience administering **Tomcat**and/or **WebLogic**in enterprise environments.
- Proficiency with **SQL**fundamentals for connectivity/health checks (any RDBMS).
- Solid experience with **Linux**(RHEL/CentOS/Ubuntu) and **Windows Server**basics.
- Experience with **logging/monitoring**(e.g., Splunk) and **vulnerability**tooling (e.g., Tenable).
- Familiarity with **GitLab CI/CD**, **Docker**, and **Terraform**(working level).
- Scripting in **Bash**and/or **PowerShell**for automation.
- Strong troubleshooting, documentation, and stakeholder communication skills.

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