Sai Peruka
Professional Summary
Network & Cybersecurity Engineer with 4+ years of experience securing and supporting enterprise infrastructure across Windows Server, networking, and hybrid cloud environments. Skilled in L2/L3 troubleshooting, WAN design (MPLS/SD-WAN), firewall and VPN configuration, endpoint NAC, security incident response, vulnerability management, and documentation. Proven ability to stabilize production networks, enforce access controls, and automate repetitive configuration tasks to reduce errors and improve consistency.
Technical Skills
Work Experience
- Provide Level 2/3 support for escalated network, security, and infrastructure incidents (routing, firewall/VPN, DNS/DHCP, authentication) to restore services and reduce outage impact.
- Administer Windows Server estate including Active Directory, DNS, DHCP and Group Policy to manage user/group access and resolve authentication/permission issues for enterprise users.
- Implemented and maintained FortiNAC to enforce endpoint compliance and network segmentation across enterprise VLANs, reducing non-compliant endpoints and improving access control.
- Designed and deployed multi-site WAN using MPLS combined with SD-WAN to connect branch locations, improving application availability and resilience across sites.
- Configure and support site-to-site and remote VPN tunnels; troubleshoot encryption/authentication and maintain VPN policies to ensure secure remote and branch connectivity.
- Configure and optimize Cisco, Juniper and Aruba CX switching (VLAN segmentation, trunking, STP, ACLs, inter-VLAN routing, HA links) and use SolarWinds monitoring to identify bottlenecks and capacity issues.
- Delivered security incident response and infrastructure hardening across networking, security, and hybrid cloud services for enterprise customers in a managed-services environment.
- Performed firewall rule reviews and access control audits, recommending rule rationalization and changes to lower attack surface and improve compliance posture.
- Assessed security of cloud workloads integrated with on-prem infrastructure, validating VPN tunnel encryption, cloud routing configurations, and access controls for secure connectivity.
- Investigated and resolved security tickets including unauthorized access attempts, phishing reports, and malware alerts; documented root cause and remediation steps to maintain SLAs.
- Assisted planning and execution of security-focused infrastructure upgrades and migrations, coordinating change windows and validation steps to minimize exposure and downtime.
- Collaborated with security and compliance teams to prepare audit evidence and remediate findings identified during assessments, improving control maturity and audit readiness.
Projects
- Automated routine network configurations for routers, switches, and firewalls using Python and Ansible to reduce manual errors and increase deployment consistency.
- Built playbooks and scripts to standardize device configuration and verification steps, shortening configuration time and reducing configuration drift across environments.
Education
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