Sai Pratheeeksha

About Sai Pratheeeksha

Support enterprise routing, switching, wireless, and hybrid-cloud networks, managing traffic flow, device configs, and fault recovery to keep core business systems stable and highly available.• Configure and maintain Cisco routers, Catalyst switches, and wireless controllers, implementing VLANs, STP, LACP, and routing policies that reduce congestion and strengthen traffic segmentation across environments.• Build and tune OSPF and BGP routing, validate HA paths, and monitor route behavior to prevent routing loops, reduce latency, and ensure consistent failover across distributed sites.• Deploy and manage IPSec VPN tunnels, SSL remote access, and 802.1X authentication to secure connectivity for on-prem and remote teams without interrupting day-to-day operational workflows.• Investigate packet flow issues using Wireshark, traceroute, SNMP, and Syslog, correlating events and logs to isolate failures, identify misconfigurations, and drive faster network recovery.• Manage AWS VPC routing, subnets, NAT, Security Groups, VPN links, and DNS rules to support secure hybrid cloud communications and predictable cross-region traffic behavior.• Automate routine tasks including device checks, log pulls, IP verification, and user access updates using Bash and PowerShell, improving consistency and freeing engineering bandwidth for project work.• Validate firewall policies, NAT rules, and traffic filters on Cisco ASA and FortiGate platforms, aligning rule changes with documented requests and minimizing service impact during maintenance windows.• Troubleshoot VLAN issues, DHCP scope conflicts, DNS lookup failures, and access layer faults, restoring network access and reducing support escalations through structured diagnostics and documentation.• Maintain configuration backups, topology maps, access lists, and change records following compliance and audit standards, ensuring traceability and continuity across operations and support teams.• Partner with security, cloud, and infrastructure teams on migrations, performance tuning, and network hardening efforts, ensuring alignment between technical changes and business availability requirements.

Experience

1. Network Engineer

   Discover

   Jun 2025 — Present · US

   Engineered a high-performance enterprise network infrastructure supporting Discover’s cloud tokenization platform, using AWS Direct Connect, hybrid connectivity, and multi-site data centers, ensuring secure, low-latency digital payment transactions & reducing network latency nearly 12%.• Designed Layer-2/Layer-3 network segmentation, VLANs, OSPF/BGP routing, HSRP redundancy, optimizing traffic flow and fault tolerance, collaborating with DevOps, cloud, and security teams to align enterprise network design with business objectives and KPIs.• Strengthened network security posture by deploying Next-Gen Firewalls, granular ACLs, sensitive traffic segmentation, integrating AWS security groups, achieving PCI-DSS compliance, and reducing unauthorized access incidents by 10%, ensuring secure hybrid cloud connectivity.• Implemented network monitoring, analytics, and automation using NetFlow, SIEM dashboards, and Bash/Shell scripts, proactively detecting anomalies, reducing configuration errors, automating provisioning tasks, and achieving measurable operational efficiency improvements of 8%.• Produced complete documentation, including network diagrams, runbooks, change management plans, and compliance evidence, collaborating with cloud, security, and application teams to ensure audit readiness, knowledge transfer, and operational alignment across environments.• Participated in cross-functional planning and cloud integration, deploying AWS VPC peering and hybrid microservices connectivity, translating technical requirements into scalable designs, monitoring KPIs, reducing latency by 6%, supporting organizational growth and tokenization services.

Education

• Northern Illinois University

  Graduate, Computer Science

• GITAM Deemed University

  Bachelor's degree, Computer Science

  2018 — 2022