Job Title: Lead System Administrator
Location: Chennai, Tamil Nadu
Employment Type: Full time

Job Summary
You will be responsible for managing and maintaining the organization's IT infrastructure, ensuring optimal performance, security, and reliability. This role involves configuring and troubleshooting servers, networks, and enterprise applications, as well as implementing security protocols and system upgrades. You will also provide technical support, automates processes, and collaborate with teams to enhance system efficiency. Strong expertise in Windows administration, virtualization, and IT security is essential.

Responsibilities
- Infrastructure Management
- Design, install, and configure internal-facing servers, virtual environments, networks, and firewalls.
- Proactively maintain and manage server, network, and firewall systems.
- Troubleshoot LAN/WAN and backbone infrastructure issues.
- Security & Compliance
- Monitor M365 security alerts, logs, and reports to detect and respond to security incidents.




- Ensure IT infrastructure aligns with ISO 27001 and SOC 2 Type 2 security and compliance standards.
- Manage patching and vulnerability remediation for end-user machines, ensuring security updates are tested and deployed efficiently.
- Conduct security assessments and audits of M365 configurations and permissions.
- Implement security controls in M365, Azure AD, Microsoft Defender, and Azure Information Protection.
- Work with security tools (SIEM, IDS/IPS, DLP, endpoint security solutions like Falcon, Endpoint Protector, etc.).
- Project & Risk Management
- Develop and implement project plans, risk assessments, and contingency plans.
- Assist with hardware, firewall, and software vendor evaluation and negotiations.
- Support & Maintenance
- Provide after-hours support for infrastructure emergencies and occasional weekend maintenance.
- Maintain inventory and asset configuration documentation.
- Collaboration & Training
- Mentor and cross-train team member

📌 Lead System Administration (Chennai)
🏢 CoreStack
📍 Chennai