Summary

Overview

Work History

Education

Skills

Websites

Core Technical Skills

Timeline

VAMSI KRISHNA

Hyderabad

Summary

Skilled Windows Server Administrator with 7 years managing enterprise infrastructure, including Active Directory, virtualization, and Microsoft 365. Expertise in patch management and vulnerability remediation. Experienced in PowerShell automation and system administration, facilitating cross-team coordination in SLA-driven environments. Enhanced system efficiency and reduced server downtime through effective troubleshooting and Windows Server configuration.

Overview

years of professional experience

Work History

Windows Server Administrator / Patch Engineer

ZELIS

08.2024 - Current

Administering Windows Server environments, ensuring high availability and performance
Managing Active Directory (users, groups, OUs, GPOs) and access control
Supporting DNS, DHCP, and domain services
Performing server upgrades, application installations, decommissioning, and maintenance activities
Managing VMware and Hyper-V virtual machines, including provisioning and migrations
Performing Azure VM operations, including snapshot automation and maintenance
Troubleshooting performance issues (CPU, memory, disk utilization)
Executing Windows Server patching across environments with 98%+ compliance
Managing patch deployment using SCCM/MECM, WSUS, Ivanti, and ManageEngine
Conducting patch testing and validation before production rollout
Remediating vulnerabilities including: SMB, TLS/SSL, NTLM, CredSSP, RDP hardening (NLA enforcement), .NET vulnerabilities, Log4j remediation
Implementing security hardening and compliance controls
Developing PowerShell scripts for patch compliance reporting and server health checks
Automating Azure VM snapshot creation prior to patching
Configuring FTP/SFTP solutions (Cerberus, FileZilla, CompleteFTP)
Implementing SSL/TLS certificates for secure communication
Managing application lifecycle (installations, upgrades, decommissioning)
Managed end-to-end patch lifecycle and server maintenance activities
Assessed patch risks and developed deployment strategies for critical systems
Planned and coordinated patch schedules with application and business teams
Resolved patch failures and directed rollback/recovery during incidents
Acted as primary point of contact for patching, vulnerability, and audit activities
Collaborated with network, database, and security teams for issue resolution
Provided technical expertise to IT teams and end-users
Ensured adherence to SLA, CAB, and compliance processes

Senior Executive, IT Infrastructure

SUPERGAS (SHV Energy)

05.2024 - 08.2024

Administered Active Directory, Azure AD, and Microsoft 365 environments to ensure seamless user access and security compliance
Managed user provisioning, MFA, licensing, and mailbox configurations to enhance user experience and streamline onboarding processes
Supported server operations and coordinated patching to maintain system integrity and minimize downtime
Worked on Commvault backup solutions and data protection
Planned maintenance and patch schedules with stakeholders
Provided infrastructure support and issue resolution

Microsoft Technology Specialist

LOCUZ ENTERPRISE SOLUTIONS

01.2023 - 05.2024

Administered Microsoft 365 and Azure AD environments
Managed Active Directory for 300+ users, configuring GPOs and access control to enhance security and compliance
Managed file servers, permissions, and access management
Managed VMware/Hyper-V environments (50+ VMs)
Performed VM provisioning, migrations, and performance tuning
Executed Windows patching achieving over 95% compliance using SCCM/ManageEngine, ensuring system stability and security
Monitored infrastructure using SCOM, Nagios, Zabbix, PRTG, OpManager
Performed vulnerability remediation and security hardening
Developed PowerShell scripts for reporting and validation
Automated Azure VM snapshot processes to streamline backup and recovery efforts
Implemented Intune policies and endpoint security (SentinelOne)

Technical Lead, Windows Infrastructure

COGNIZANT

02.2020 - 01.2023

Led Windows Server administration and patching operations
Managed change requests, secured CAB approvals, and streamlined rollout schedules for timely project delivery
Implemented strategies to minimize post-patch incidents across systems
Coordinated QA/UAT testing and production deployments to ensure seamless software releases
Mentored team members and facilitated infrastructure operations to enhance team capabilities

Business Associate, IT Operations

ACCENTURE

07.2018 - 02.2020

Handled incident management and access requests while fulfilling service requests to maintain operational continuity
Operated in ITIL-based environment, adhering to strict SLAs to deliver timely IT services
Supported Windows OS and managed user accounts in Active Directory to ensure smooth user operations