Sivakumar C
Open to work3 years experienceSystems Administrator
Systems Administrator | Infrastructure Engineer | Cloud & DevOps Engineer
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Skills & Technologies
21 skillsWork Experience
System Administrator
Surya Financial Technologies Pvt. Ltd.
- Administer 250+ Linux (Ubuntu, CentOS, openSUSE, RHEL) and Windows Server 2012–2025 production systems, covering OS patch management, security hardening, performance tuning, and root-cause troubleshooting.
- Own end-to-end server lifecycle management — provisioning, configuration baselining, and decommissioning — using Terraform IaC modules and Ansible playbooks, cutting configuration time by 60% and eliminating drift.
- Administer VMware ESXi and Hyper-V hypervisor environments: VM templates, snapshots, resource pools, vSwitch configuration, and HA clustering to maintain infrastructure resiliency.
- Deploy and manage containerized and traditional web workloads (Docker, Kubernetes, IIS, Nginx); configure Application Pools, DNS, SSL, and AWS Security Groups for high availability.
- Manage Active Directory, Azure AD/Entra ID, Group Policy Objects (GPO), Microsoft 365, Intune, DNS, DHCP, and NAS storage supporting 200+ end users.
- Design and maintain Backup & Disaster Recovery policies across on-premises and cloud (Azure Backup, S3, RDS snapshots), running scheduled restore tests to meet defined RPO/RTO targets.
- Create, configure, and maintain MSSQL, Oracle, and PostgreSQL databases end-to-end — performing scheduled backups, restore testing, patching, and performance tuning to ensure data integrity and availability.
- Enforce endpoint security and network defense using SentinelOne EDR and FortiGate Firewall — policy tuning, threat detection, and VPN administration across 250+ endpoints with zero critical incidents in 12+ months.
- Set up and maintain Prometheus, Grafana, CloudWatch, and Azure Monitor dashboards (10+ custom views) for proactive infrastructure monitoring and alerting.
- Support hybrid infrastructure spanning AWS (EC2, S3, VPC, IAM, Route 53) and Azure (VMs, Blob/File Storage, VNet, NSG) to sustain 99.9% platform uptime for a financial services environment.
- Log, triage, and resolve infrastructure incidents and service requests following ITIL-aligned Incident and Change Management processes, meeting SLA commitments.
- Reduced infrastructure provisioning time by 80% by building reusable Terraform IaC modules for AWS EC2, VPC, Security Groups, IAM, and S3 remote state, eliminating configuration drift across environments.
- Designed and maintained CI/CD pipelines using Jenkins, GitHub Actions, and Azure DevOps, cutting manual release effort by 70% through fully automated build, test, and deployment workflows.
IT Support Engineer
Collabera Digital
- Resolved 20+ daily infrastructure incidents across Linux and Windows environments, maintaining 98% SLA compliance within an ITIL-based ticketing framework.
- Administered Active Directory, Group Policy, and Microsoft 365 for 150+ users; monitored AWS resource health using CloudWatch.
- Automated user access provisioning and revocation workflows via scripting, cutting access-management effort by 50% and eliminating manual provisioning errors.
Projects
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Leaderboard Standings
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Assessment Highlights
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AI Collaboration Score
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Role Compatibility Profile
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Achievements
Zero critical security incidents
Maintained zero critical security incidents across 250+ endpoints over 12+ months by enforcing SentinelOne EDR policies, FortiGate firewall rules, and proactive patch management.
99.9% uptime SLA
Sustained 99.9% uptime SLA for mission-critical infrastructure serving a financial services platform, with zero unplanned outages during tenure.
On-premises-to-cloud migration
Led migration of on-premises workloads to AWS and Azure, enabling hybrid infrastructure operations and improving disaster recovery capability with documented RPO/RTO targets.
Automated access-provisioning
Eliminated manual access-provisioning errors for 200+ users by scripting end-to-end Active Directory and Azure AD lifecycle workflows, reducing helpdesk tickets by 50%.
Reduced provisioning time by 80%
Reduced server provisioning and configuration turnaround time by up to 80% through infrastructure-as-code and configuration management adoption.
About Details
Professional Bio
Systems Administrator and Infrastructure Engineer with 3 years 1 month of experience managing 250+ production Linux and Windows Server environments across on-premises and hybrid cloud (AWS, Azure). Skilled in server build, configuration, automation, and maintaining 99.9% uptime.
B.E. in Computer Science
Pavai College of Technology (2019 - 2023)