Dinesh Kumar Shanmugavel Shanmugavel

System Administrator | IT Infrastructure & Azure Administrator | 5.9 Years Experience

A highly skilled System Administrator with 5.9 years of experience in Windows Server Administration, Azure AD, Office 365, Email Security, IT Infrastructure, and Remote Technical Support. Proven ability in managing enterprise IT environments, resolving critical incidents, and ensuring smooth operations across global locations. Strong expertise in identity management, access control, monitoring, and IT security compliance. Adept at troubleshooting complex technical issues, managing IT assets, and supporting over 3000+ endpoint users.

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Key Responsibilities
• Administration & management of Azure Active Directory, user provisioning, group policies, and license management (E1, E3, P1).
• Office 365 administration including Exchange migration, SharePoint, OneDrive, and mail flow troubleshooting.
• Email gateway security management using Barracuda, ESET, O365 Quarantine, and spam/phishing threat analysis.
• Windows Server 2008/2012/2016 installation, configuration, patching & maintenance using WSUS.
• Managing DNS, DHCP, AD, OU structure, RDP sessions, printer queues & system access permissions.
• Configuring & troubleshooting Intune device compliance, mobile device management & endpoint protection.
• Monitoring infrastructure using tools like Nagios, PRTG, Velocloud, Dell OME & Windows Server Manager.
• Supporting global IT operations with remote and onsite support.
• ITSM ticket handling, RCA creation, incident reporting, CAB meetings & change management.
• Network & firewall administration (Barracuda), LAN/WAN troubleshooting & hardware coordination with OEM vendors.
• Managing virtualization platforms VMware & Hyper-V and Citrix support.

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Technical Skills

Azure AD, Office365, Windows Server, Active Directory, Group Policy, DNS, DHCP, Intune, SharePoint, OneDrive, Exchange Online, VMware, Hyper-V, Citrix, Barracuda Firewall, Nagios, PRTG, Velocloud, McAfee & CrowdStrike, ITSM Ticketing Tools (Tickx, Xurrent).

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Looking For

Opportunities in System Administrator / Azure Administrator / IT Infrastructure / O365 Admin / Desktop & Server Support roles where I can contribute my technical skills, enhance cloud knowledge, and support business IT operations efficiently

Hybrid Cloud & Enterprise IT Infrastructure | 3, 000+ Users | Global Multi-Site Operations
Azure & Cloud Administration
• Administered Microsoft Entra ID (Azure Active Directory) for a hybrid identity environment managing 3, 000+ user
accounts, security groups, and access policies across global office locations — achieving 99.9% identity service uptime
• Configured and maintained Azure AD Connect with OU-level filtering for seamless on-premises AD to Azure hybrid
identity synchronization; implemented Seamless SSO and Password Hash Synchronization to eliminate access friction
• Enforced Zero Trust security principles through Conditional Access policies, Privileged Identity Management (PIM),
Named Location policies, and MFA enforcement — reducing unauthorized access incidents by ~40%
• Managed M365 license lifecycle and cost optimization (E1, E3, P1); led on-premises Exchange to Exchange Online
migration for 1, 500+ mailboxes with zero data loss and minimal business disruption
• Administered Microsoft Intune (MDM/MAM) to enforce device compliance policies, app protection policies, and
Windows Autopilot enrollment across 3, 000+ Windows and mobile endpoints
• Deployed SharePoint Online, OneDrive for Business, and Teams governance policies; configured Microsoft Purview for
DLP, retention labels, and compliance auditing to meet regulatory requirements
• Implemented Azure Monitor alerts, Azure Backup policies, and Azure Site Recovery (ASR) configurations; managed
Azure Cost Management governance using Azure Policy and budget alerts
Windows Server & Infrastructure
• Installed, configured, and administered Windows Server 2008-2022 in on-premises and virtualized environments
(VMware, Hyper-V); optimized VM resource allocation and managed RDP access controls for remote workforce
• Managed Active Directory domain services including user accounts, OUs, GPOs, DNS, DHCP, and access permissions;
deployed security patches via WSUS ensuring 100% compliance within SLA windows
• Designed and configured server rack infrastructure and network topology for new office expansions; coordinated
hardware procurement with HP, Dell, Lenovo, and IBM
Email Security & Administration
• Administered enterprise email security via Barracuda Email Security Gateway (BSEG/BCC) and ESET Email Security;
managed quarantine, phishing threat analysis, SPF/DKIM/DMARC validation, and mail flow rules
• Maintained 99%+ email service availability across the organization; resolved complex mail flow disruptions, transport
rule conflicts, and delivery failures within SLA targets
Incident, Change & Problem Management
• Led Major Incident bridge calls and post-incident review meetings; authored Root Cause Analysis (RCA) documentation
and weekly Change Management reports presented to IT leadership
• Facilitated weekly Change Advisory Board (CAB) meetings; managed ITSM ticket triage and workload distribution via
Tickx and Xurrent platforms maintaining SLA compliance
• Integrated Nagios and PRTG monitoring with Xurrent ITSM for automated incident creation on threshold breaches —
reducing mean-time-to-detect (MTTD) by ~30% and improving proactive infrastructure visibility

Tier 1/2 IT Support | Enterprise Applications | Escalation Management | UK Stakeholder Coordination
• Delivered Tier 1/2 hardware and software IT support for enterprise environment; managed professional escalations to
UK-based L2 Desktop Support Engineers while consistently meeting SLA compliance and queue management targets
• Provided remote desktop support for enterprise applications, mainframe systems, and integrated IT tools; authored
SOPs that improved helpdesk resolution efficiency by ~20% and enabled knowledge transfer
• Received Top Performer Award — IT Care Chat Count; led IT Care Live Chat Team (6 months); served as Shift In-Charge
managing front desk IT queue operations and team of agents for 3 months
• Automated license assignment, group membership, mailbox provisioning, and secure account deactivation workflows;
produced comprehensive SOPs and IT knowledge base documentation
Nagios
◦ PRTG
◦ Xurrent
◦ Tickx
◦ ITIL® v4
• Integrated Nagios and PRTG monitoring with Xurrent ITSM for automated incident creation on real-time threshold
breaches — reducing alert-to-ticket response time by 30%
• Redesigned ticket categorization and escalation routing, improving first-call resolution (FCR) rates and SLA adherence;
built real-time operational dashboards for IT leadership visibility and capacity planning