Role: Senior

System

Admin istrator

Experience: 8+ Years.

Role Summary

Experienced IT Infrastructure and Information Security qualified responsible for managing enterprise infrastructure, Microsoft 365, Endpoint Security, cloud platforms, networking, storage, backup, disaster recovery, audit readiness, and IT operations. Capable of independently managing business-critical IT environments across on-premises, cloud, and hybrid infrastructures while ensuring security, availability, scalability, redundancy, and operational excellence.

Key Responsibilities

- Manage Enterprise IT Infrastructure including Windows Server 2012/2016/2019/2022, Active Directory, Forest & Domain Management, DNS, DHCP, DFS, Group Policy, WSUS, PKI, IAS/NPS, File & Print Services, and Wintel environments.
- Admin ister Microsoft 365 ecosystem including Exchange Online, Intune, Entra ID, Defender, Purview, Teams, SharePoint Online, OneDrive, and Windows Autopilot.
- Manage User Admin istration, Access Management, License Management, RBAC, MFA, Conditional Access, SSO, and Identity Governance.
- Manage Endpoint Security, Endpoint Compliance, Device Control, Application Control, BitLocker Encryption, Endpoint Detection & Response (EDR), Extended Detection & Response (XDR), Antivirus, Threat Protection, Attack Surface Reduction (ASR), Vulnerability Management, Endpoint Hardening, and Security Baselines.
- Admin ister and secure Windows, macOS, Android, and iOS devices using Microsoft Intune, JAMF Pro, Apple Business Manager, MDM/MAM, and Endpoint Compliance Policies.
- Perform Server Admin istration, OS Management, Patch Management, Server Migrations, Cloning, Capacity Planning, Health Checks, and Lifecycle Management.
- Implement and manage Cyber Security solutions including Microsoft Defender for Endpoint, Sophos Endpoint Security, McAfee ePO, Endpoint Protection Platforms, Email Security Gateways,



DLP Solutions, Security Hardening, Vulnerability Management, and VAPT Remediation.
- Design, implement, and support Enterprise Network Infrastructure including LAN, WAN, WLAN, MPLS, SD-WAN, Routing, Switching, TCP/IP, VLANs, NAT, Wireless Networks, and Network Segmentation.
- Configure and manage Layer 2 & Layer 3 Networking including STP, RSTP, VTP, EtherChannel, Inter-VLAN Routing, Routing Protocols, High Availability, and Redundancy Solutions.
- Configure and manage Routers, Switches, Access Points, Firewalls, and Network Security Appliances.
- Admin ister Sophos Firewalls, Security Policies, SSL VPN, IPSec VPN, Site-to-Site VPN, IPS, IDS, NAT Rules, Application Control, and Web Filtering.
- Manage Azure, AWS, and GCP cloud environments including compute, networking, storage, identity, governance, and cloud security controls.
- Admin ister NAS, SAN, RAID, Storage Replication, Cloud Storage, and Capacity Planning.
- Manage Full, Incremental, Differential, Image-Level, VM-Level, and Cloud Backups along with Disaster Recovery (DR) and Business Continuity Planning (BCP).
- Manage VMware and Hyper-V virtualization platforms including VM provisioning, migrations, cloning, snapshots, HA clusters, and resource optimization.
- Configure and support FTP, SFTP, FTPS, SSL Certificates, SPF, DKIM, and DMARC.
- Monitor enterprise infrastructure using PRTG, ManageEngine OpManager, Action1, Altris Patch Management, McAfee ePO, Azure Monitor, and Security Monitoring Platforms.




- Perform Preventive Maintenance, Root Cause Analysis (RCA), Patch Compliance, Firmware Upgrades, Security Updates, and Operational Improvements.
- Ensure Infrastructure Redundancy, High Availability, Failover Mechanisms, Business Continuity, and Operational Resilience.
- Support Internal Audits, External Audits, Security Assessments, Audit Readiness Activities, Documentation, SOPs, Risk Assessments, and Remediation Plans.
- Manage Vendors, OEMs, ISPs, Licensing, Renewals, Procurement Coordination, Budget Planning, Cost Optimization, SLA Governance, and Technology Evaluations.

Technical Skills Infrastructure & System s

Windows Server, Wintel, Active Directory, Forest & Domain Management, DNS, DHCP, DFS, WSUS, PKI, IAS/NPS, File & Print Services

Microsoft Technologies

Microsoft 365, Exchange Online, Intune, Entra ID, Defender Suite, Purview, SharePoint Online, Teams, OneDrive, Autopilot, PowerShell

Endpoint Security

Microsoft Defender for Endpoint, EDR, XDR, Endpoint Compliance, Device Control, ASR Rules, BitLocker, Endpoint Hardening, Application Control, Vulnerability Management, Sophos Endpoint Security, McAfee ePO

Networking

TCP/IP, Routing & Switching, VLANs, VTP, STP, RSTP, EtherChannel, MPLS, SD-WAN, NAT, Wireless Networks, Routing Protocols

Firewall & VPN

Sophos Firewall, SSL VPN, IPSec VPN, Site-to-Site VPN, IPS, IDS, Web Filtering, Application Control

Cloud

Microsoft Azure, AWS, GCP

Storage & Backup

NAS, SAN, RAID, Backup & Recovery, DR, BCP

Virtualization

VMware vSphere, Microsoft Hyper-V

Monitoring & Patch Management

PRTG, ManageEngine Op Manager, Action1, Altris, McAfee ePO, Azure Monitor

Security & Compliance

DLP, Email Security Gateway, VAPT, Security Hardening, Vulnerability Assessment, Risk Management, Audit Support

📌 Senior System Administrator (Bengaluru)
🏢 KnoDTec Solutions Private
📍 Bengaluru