Rajesh R - System & Network Administrator - Oncospark Pvt Ltd

Summary

Dynamic IT professional with over 7 years of experience in the hardware and networking domain, specializing in delivering innovative technology solutions and exceptional client support. Proven ability to tackle challenging projects while fostering growth and collaboration within organizations. Expertise in desktop support and a strong commitment to enhancing user experience through effective problem-solving and technical proficiency. Eager to leverage skills and knowledge to contribute to organizational success while continuously pursuing personal and professional development.

Overview

15

years of professional experience

1

Language

Work History

Senior System Admin & Network Engineer

Oncospark Pvt Ltd

02.2024 - Current

Provisioned and managed Azure Virtual Machines, including resource allocation, storage configuration, network security groups (NSG), and performance optimization to meet organizational cloud requirements.
Led organization-wide Multi-Factor Authentication (MFA) implementation to enhance identity security and ensure compliance with security best practices.
Administered Microsoft 365 (O365) including user provisioning, license assignment, mailbox configuration, security policy enforcement, and advanced troubleshooting.
Provided L2/L3 technical support for US and domestic users, ensuring minimal downtime and high SLA adherence.
Monitored and managed service requests via JIRA Service Management, ensuring timely resolution of user-end infrastructure and application issues.
Configured and maintained Veeam Backup & Replication for both on-premises and cloud workloads, including backup scheduling, monitoring, restoration testing, and disaster recovery validation.
Managed Zoho Vault for secure credential storage, user onboarding/offboarding, and role-based password access control.
Led migration of on-premises Active Directory users to Azure AD & Microsoft Intune, including device enrollment, policy configuration, and endpoint compliance enforcement.
Monitored and managed SonicWall Firewall activities including website filtering, VPN user management, intrusion prevention, vulnerability monitoring, and firewall rule optimization.
Administered Sophos Endpoint Security, actively monitoring logs, threat alerts, user activity, and performing remediation to ensure uninterrupted business operations.
Developed and maintained IT policies, SOPs, risk assessments, and compliance documentation aligned with HIPAA, SOC 2, ISO 27001, ISMS, and ITIL v4 frameworks.
Coordinated and supported internal and external audits, ensuring adherence to regulatory and information security standards.
Implemented access control policies based on least privilege principles and conducted periodic access reviews.
Managed asset lifecycle including procurement, deployment, maintenance, and secure decommissioning.
Performed root cause analysis (RCA) for recurring infrastructure and security incidents to prevent future occurrences.
Collaborated with cross-functional teams for infrastructure upgrades, cloud optimization, and security enhancements.And ensuring the process were maintained accordingly.
Implemented Conditional Access Policies in Azure AD.
Configured BitLocker encryption & endpoint compliance.
Conducted vulnerability assessments and remediation planning.
Implemented role-based access control (RBAC) across cloud and on-prem systems.policies via Intune.
Configured BitLocker encryption & endpoint compliance policies via Intune.

Senior Network Engineer

S2M Healthcare Pvt Ltd

04.2023 - 01.2024

Technical Engineer

Getmax DMCC

11.2021 - 08.2022

System Administrator

Fourth Dimension Technologies

03.2017 - 11.2021

Own Startup

Hue Technical Solution

02.2014 - 02.2017

Wintel Administrator

Fourth Dimension Technologies P Ltd.

09.2011 - 12.2013

Education

Diploma - computer Engineering (DCE)

Department of Technical Education

CCNA - Course completed

Sansbound Technologies

Higher secondary - undefined

SDA matriculation

Chengalpattu

Skills

System Administration:
Windows Server 2008/2012/2016/2019/2022 Active Directory GPO DNS DHCP File & Print Services WSUS Server Hardening Hyper-V Patch Management

Network & Security:
SonicWall & Fortinet Firewalls NAT VLAN Site-to-Site VPN Remote VPN Firewall Policies Network Segmentation LAN/WAN Troubleshooting

Endpoint & Security Tools:
Sophos McAfee ePO CrowdStrike Seqrite Quick Heal Kaspersky ManageEngine Endpoint Central Threat Monitoring & Remediation

Microsoft 365 & Cloud:
Microsoft 365 Admin Exchange Online SharePoint Online Microsoft Teams Azure VM Hybrid AD Integration

Backup & Disaster Recovery:
Veeam Backup & Replication Druva NAS Backup Scheduling Restoration Testing DR Planning

IT Service Management:
JIRA Freshservice ManageEngine ServiceDesk Plus Incident, Problem & Change Management SLA Monitoring

Desktop & Infrastructure Support:
Windows 10/11 Hardware & Peripheral Support MS Office Outlook IT Asset Lifecycle Management

Physical Security Systems:
CCTV Biometric Systems Access Control Installation & Monitoring

Accomplishments

Enterprise Workstation Upgrade & Security Hardening Project

Successfully led and delivered a large-scale enterprise project involving the upgrade and deployment of 800+ Dell systems within the agreed cut-over timeline.
Planned and executed end-to-end system rollout including hardware installation, OS deployment, configuration, and domain integration.
Managed bulk data migration and user profile transfers ensuring zero data loss and minimal business disruption.
Applied standardized security hardening policies and security templates across all deployed systems.
Performed security configuration analysis and vulnerability remediation post-deployment.
Installed and updated enterprise antivirus solutions and ensured compliance with organizational endpoint protection standards.
Coordinated with cross-functional teams and vendors to ensure seamless execution and timely project completion.
Achieved successful go-live with minimal downtime and high user satisfaction.

🔹 Audit & Compliance Excellence

Successfully participated in and supported Internal, External, ISO 27001, ISMS, and SOC 2 audits across the organization.
Prepared and maintained security documentation, SOPs, access control records, and risk assessment reports.
Ensured adherence to compliance frameworks through implementation of structured IT governance and security controls.
Addressed audit observations and implemented corrective actions within defined timelines.
Contributed to maintaining continuous compliance posture and improved audit readiness across IT operations.

Timeline