Arjun Kumar

IT Infrastructure & Security professional with 12+ years of experience across enterprise and manufacturing environments, leading infrastructure operations, network security, Microsoft 365 administration and IT service delivery. Currently responsible for 500+ endpoints across corporate and manufacturing sites, with hands-on ownership of Microsoft 365, Entra ID, Exchange Online, Sophos security, enterprise networking, Windows Server and IT governance. Strong track record in team leadership, vendor/AMC management, infrastructure projects, cloud adoption, backup/DR, security controls and business-aligned IT roadmaps.

Deputy Manager – IT Infrastructure & Security at Okaya Power Pvt. Ltd. (2022-01 – Present)

• Lead enterprise IT infrastructure and support operations across corporate offices and manufacturing facilities, covering a 500+ endpoint environment.
• Drive 99.9% infrastructure availability through monitoring standards, escalation processes, service levels and proactive operational governance.
• Own Microsoft 365 administration and governance across Exchange Online, SharePoint Online, OneDrive and Microsoft Teams, including security and compliance controls.
• Manage Microsoft Entra ID identity and access strategy, including Conditional Access, MFA, account lifecycle and access governance; reduced unauthorized access risk by enforcing MFA and Conditional Access across all user accounts.
• Lead enterprise email administration covering Exchange Online, mailbox services, distribution groups, mail flow and Microsoft 365 user administration.
• Set standards for Windows Server, Active Directory, DNS, DHCP, Group Policy and file-server infrastructure across sites, improving consistency and reducing configuration-related incidents.
• Plan and manage WAN, MPLS, Internet Leased Lines, VPN, routing, switching and Wi-Fi infrastructure for reliable multi-site connectivity across [X] locations.
• Own Sophos Firewall security policy covering IPS, VPN, web filtering and application control; led Sophos XDR deployment, cutting mean time to detect and remediate threats and strengthening the organization's overall security posture.
• Own backup, disaster recovery and business continuity planning, while leading infrastructure upgrades, cloud adoption and endpoint-security initiatives with zero data-loss incidents to date.
• Manage IT vendors, AMCs, procurement and budgets end-to-end, negotiating contracts that reduced annual IT vendor costs by [X%].

Senior Executive – IT at ASK Automotive Pvt. Ltd. (2019-05 – 2022-06)

• Managed IT infrastructure across [X] manufacturing plants and corporate offices, supporting approximately [X] users and endpoints.
• Administered Active Directory, Windows Server, Group Policy, DNS, DHCP and user lifecycle management, maintaining uptime and reducing account-provisioning turnaround time.
• Installed, upgraded and maintained enterprise servers and storage systems; managed backup, patching and DR testing, ensuring recovery objectives were consistently met.
• Managed switches, routers, firewalls and VPN connectivity across enterprise network environments spanning multiple sites.
• Coordinated IT vendors, AMCs, procurement and asset lifecycle activities; supported ERP, production systems and end-user computing for [X]+ employees.

IT Engineer at Havells India Ltd. (2016-01 – 2018-12)

• Supported enterprise IT infrastructure across manufacturing locations and participated in the migration from Lotus Notes to Microsoft 365 Exchange for [X]+ mailboxes.
• Supported barcode printers, industrial systems, CCTV, biometric devices and shop-floor IT infrastructure across production facilities.
• Managed Active Directory, SCCM deployments, Windows imaging and software distribution, standardizing endpoint builds across the organization.
• Administered FortiGate Firewall, LAN/WAN infrastructure and endpoint security, contributing to a stable and secure network environment.

IT Engineer at GAC Computer Pvt. Ltd. (2012-01 – 2016-12)

• Delivered enterprise IT support for multiple corporate clients, covering Windows Server, desktops, printers and networking equipment.
• Configured Outlook, Lotus Notes, Active Directory, LAN/WAN infrastructure and antivirus solutions, maintaining reliable day-to-day operations for client environments.

Diploma in Information Technology – Dr. Bhim Rao Ambedkar Technical Institute (2010-01)