Summary
Overview
Work History
Skills
Certification
Timeline
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Diptesh Nath Tiwari

BCA (Computer Science)
Ghaziabad

Summary

Technical Service Engineer – Active Directory Administrator (Level 2) supporting enterprise Active Directory, DNS, and Group Policy across production environments. Resolves replication failures, account lockouts, authentication issues, and domain controller health incidents using tools such as repadmin, dcdiag, nltest, and netdom. Supports domain controller builds, promotions, demotions, decommissioning, and change windows for Windows, Linux, VMware, and AVD/WVD deployments.

Overview

4
4
Certificates
8
8
years of professional experience

Work History

Technical Service Engineer – Active Directory Administrator (Level 2)

Fujitsu Consulting, Noida
06.2022 - 09.2024
  • Active Directory administration, replication troubleshooting, DNS, Group Policy management, Domain Controller build, promotion, demotion, decommissioning and Active Directory health checks, Handled production incidents and supported Windows, Linux, and VMware deployments by creating necessary DNS records and participating in domain decommissioning activities., Resolved replication failures using tools like: repadmin , dcdiag ,nltest ,netdom., Unlocking accounts , Re-enabling disabled accounts.
  • Attended P1 and P2 calls to address time sync issues and service account expirations, resolved GPO issues affecting desktop shortcut URLs and browser authentication, represented AD team during maintenance activities, and prepared health checks including AD replication, time synchronization, DC backups, and DNS management. Example:- In case of new Exsi, Linux machine deployment working on group policies, changing screensaver regularly, Creating desktop shortcut, Working on service now tickets like account lock out trace using splunk adding removing group membership delegation control for user and computer management creation of computer object along with provide domain join permission DC promotion demotion weekend activity of line defragment for reduce AD database size .
  • Organizational Unit (OU) Management
  • Cleaned up unused and empty organizational units.
  • Domain Decommission Project
  • Participated in complete domain decommissioning activities.
  • Responsibilities included:
  • Inventory collection
  • Dependency analysis
  • GPO cleanup
  • Trust removal
  • DNS cleanup
  • Metadata cleanup
  • Domain Controller demotion
  • Final decommission validation
  • Troubleshooting and support for AVD/WVD infrastructure (host pools, session hosts, FSLogix profiles, etc.)
  • Utilized ITIL framework for incident and change management within ServiceNow to streamline processes and improve service delivery.
  • Projects: Bridgestone EMEA and Daikin US

Senior Specialist – Windows/Azure Admin (Level E2 Engineer)

HCL Technologies, Noida SEZ
11.2018 - 06.2022
  • Incident, change, and configuration management using IRIS
  • Built and decommissioned Windows VMs to support project needs
  • Troubleshooting complex VM/server issues
  • Patch updates and critical security updates
  • Root-cause analysis and escalation resolution
  • Documented SOPs, HLDs, LLDs, and process flows to ensure operational consistency
  • Managed Active Directory, including users, roles, and permissions to maintain secure access
  • Hardware & tool exposure: HP ProLiant Servers, IBM X Series, HP SMH, Symantec NetBackup
  • Project: Johnson & Johnson Steady State

Windows Administrator

Collabera Technologies Pvt. Ltd.
04.2016 - 11.2018
  • Installation, configuration, and maintenance of Active Directory
  • Group Policy creation and management
  • Managed AD replication and operations masters, ensuring seamless domain controller functionality and stability.
  • Coordinated incident and change management via IRIS, facilitating timely resolution of IT issues and minimizing downtime.
  • Installation & configuration of DNS, DHCP, and clustering
  • RAID implementation, logical disk expansion
  • Incident/change management via IRIS
  • Provided desktop and laptop support, managed LAN, and administered Active Directory, enhancing user access and system reliability.

Skills

Skills

Active Directory administration

DNS management

Group Policy management

Windows Server administration

PowerShell scripting

Microsoft Entra ID

Azure Virtual Desktop

FSLogix

Kerberos troubleshooting

Certificate services

Domain controller management

Organizational Unit management

User account management

Group membership administration

Replication troubleshooting

Incident management

Change management

Root cause analysis

Documentation

Escalation management

Certification

Microsoft Certified: Azure Virtual Desktop Specialty (AZ-140)

Timeline

Technical Service Engineer – Active Directory Administrator (Level 2)

Fujitsu Consulting, Noida
06.2022 - 09.2024

Senior Specialist – Windows/Azure Admin (Level E2 Engineer)

HCL Technologies, Noida SEZ
11.2018 - 06.2022

Windows Administrator

Collabera Technologies Pvt. Ltd.
04.2016 - 11.2018

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Diptesh Nath TiwariBCA (Computer Science)