Job Description

Job Title: L3 Support System Administrator Location: Mumbai, Thane, India Job Type: Full-Time Shift: 24x7 Operations Support Department: NOC, SOC, and Help Desk Job Summary: We are seeking a skilled L3 Support System Administrator with expertise in 24x7 NOC, SOC, and Help Desk operations to provide advanced support and troubleshooting across multiple client environments. The ideal candidate will have extensive experience in maintaining, configuring, troubleshooting, and monitoring infrastructure across Windows and Linux platforms . Strong skills in O365, Azure administration , as well as advanced incident management and troubleshooting, are essential. This role requires a proactive, highly technical individual with a focus on operational excellence, ensuring uptime, and executing maintenance and project plans efficiently. Key Responsibilities: Advanced Technical Support & Troubleshooting: Provide L3 support for complex incidents and problems, primarily involving Windows and Linux systems . Troubleshoot and resolve escalated technical issues for client environments across servers, networks, applications , and cloud services (O365, Azure). Work closely with the NOC, SOC , and Help Desk teams to ensure all incidents are handled efficiently, meeting SLAs and resolving high-priority issues. Perform detailed diagnostics, system checks, and root cause analysis to ensure the resolution of complex issues. Infrastructure Maintenance & Configuration: Manage and configure Windows and Linux servers, networks, storage, and cloud infrastructure (O365, Azure) to maintain high availability and optimal performance. Apply patches, updates, and security fixes to systems and applications, ensuring compliance with security policies and industry best practices. Perform system backups , disaster recovery , and data protection tasks , ensuring client data integrity and uptime. Regularly monitor infrastructure performance using monitoring tools to identify potential issues and proactively address them. O365 & Azure Administration: Manage and support O365 and Azure environments, including user provisioning, access management, and troubleshooting. Configure, maintain, and troubleshoot O365 applications (Exchange, Teams, SharePoint, etc.) and Azure services (VMs, AD, networking, etc.). Collaborate with clients to implement and maintain cloud solutions and provide guidance on best practices for O365 and Azure usage. Incident & Ticket Management: Use a ticketing system (e.g., ServiceNow, Jira, ConnectWise) to log, prioritize, and track incidents, ensuring prompt resolution and documentation of all steps taken. Take ownership of complex tickets, escalate when necessary, and ensure clear communication with clients regarding resolution progress. Maintain accurate and comprehensive documentation of all incidents, fixes, configurations, and updates. Client Environment Management & Maintenance: Manage client environments proactively to minimize downtime and ensure operational continuity. Assist in systems upgrades, migrations, and projects , including the rollout of new applications or infrastructure changes. Collaborate with internal teams and clients to ensure that maintenance schedules are met and that updates and changes are carried out with minimal impact on operations. Operational Excellence & Process Improvement: Identify and implement improvements to operational processes, workflows , and incident management procedures to enhance support efficiency and service delivery. Contribute to the development of knowledge base articles , internal documentation, and training materials. Stay updated with industry trends, new technologies , and best practices to provide cutting-edge solutions and improve client satisfaction. Qualifications & Skills: 5+ years of experience in an L3 System Administrator role, supporting Windows, Linux, O365 , and Azure environments . Expertise in network administration , server management , troubleshooting , and system monitoring across multiple client sites. Advanced experience with O365 and Azure management , including administration, troubleshooting, and configuration. Proficient in remote troubleshooting and resolution, including use of remote management and monitoring tools. Strong understanding of incident management , ticketing systems, and SLA adherence. Excellent problem-solving and analytical skills , with a strong ability to diagnose and resolve complex technical issues. Solid scripting and automation skills (e.g., PowerShell, Bash) for system management and incident resolution. Strong documentation skills, with the ability to write clear, concise, and accurate technical reports and knowledge articles. Excellent communication skills with the ability to interact with clients, understand requirements, and provide technical support in a user-friendly manner. Preferred Certifications: Microsoft Certified: Azure Administrator Associate or Microsoft Certified: Security, Compliance, and Identity Fundamentals Linux Professional Institute Certification (LPIC-1 or LPIC-2) CompTIA Network+ , Security+ , or other relevant IT certifications. ITIL Foundation or higher. Why Join Us? Work in a dynamic, fast-paced environment supporting mission-critical client systems and infrastructure. Collaborate with a highly skilled team to provide exceptional service and solutions to a diverse set of clients. Competitive salary, benefits, and opportunities for career growth and development .