Avishkar Singh

Administer and maintain Windows and Linux Systems, ensuring optimal performance, security, and uptime. Manage Active Directory (AD), including user account lifecycle, group policies, authentication, and access controls. Configure, monitor, and secure OPNsense firewalls, VPNs, and network infrastructure to enhance reliability and safeguard against threats. Migration from Microsoft Exchange Server to in-house IMAP mail server, improving scalability and reducing costs.

As a Senior Active Directory Engineer at Netcracker Technology Solutions, I am responsible for managing enterprise-level Active Directory and Identity Management solutions. I ensure the security, stability, and scalability of our AD infrastructure while driving efficiency through automation. Securing and managing AD using LDAP, Kerberos, SSO, OAuth & MFA. Implemented Semperis for proactive identity threat detection. Managed server patching via WSUS and infrastructure via iDRAC. Led Azure migrations and enfo

As an Operations Engineer at Commonwealth Bank, I was part of the Active Directory team, responsible for managing and optimizing the organization's identity and access management infrastructure. My focus was on ensuring the security, efficiency, and reliability of AD services. Designed and migrated enterprise AD infrastructure (2016–2022). Administered GPOs, ADCS, and backups using DPM. Active Directory, Identity and Access Management (IAM), PowerShell

As an Operations Lead at Concentrix, I managed a team responsible for providing Microsoft Enterprise Platform Services (EPS) support to clients. My focus was on ensuring service delivery, team performance and client satisfaction. Served as SME in Office Client Sharepoint Integration (Ocsi) Supported Office activation (MAK/KMS), IIS & Office Online Servers. Collaborated with Microsoft escalation teams to resolve critical issues. Mentored Tier 1 teams and ensured high customer satisfaction. Microsoft Enterpri

As a Senior Associate at NTT DATA Services, I provided technical support and troubleshooting for Windows Server environments, ensuring stable operations and meeting service-level agreements for clients. Resolved complex technical issues across Windows Server environments, boosting system uptime and team efficiency. Delivered remote desktop support to global users, consistently meeting aggressive SLA targets. Collaborated across departments to streamline ticket resolution, reducing escalations by 20%. Provid

As an Analyst at HCL Technologies, I provided technical support and configuration management for client IT systems, ensuring operational efficiency and adherence to service-level agreements. Provided L2/L3 support for AD tasks, IMAC, and ITSM frameworks. Maintained OneDrive & SCCM environments, user provisioning, and app installs. Delivered service excellence across healthcare and enterprise projects. Supported ITIL processes for incident, change, and problem management. Technical Support, Troubleshooting,