Network Engineer - SD-WAN & Cloud Networking Expert

Sreshta Chityala

Tel: +1-940-***-**** Email: ****************@*****.***

SUMMARY

CCNA-certified Network Engineer with 4 years of hands-on experience in designing, deploying, and securing enterprise- scale network infrastructures across data center and hybrid cloud environments.

Specialized in routing, switching, and firewall technologies using Cisco, Palo Alto, Fortinet, and F5 BIG-IP platforms to deliver secure and high-availability solutions.

Proven track record leading SD-WAN modernization and Azure ExpressRoute integrations, achieving measurable improvements in latency, uptime, and performance.

Skilled in LAN/WAN architecture, VPNs, QoS, load balancing, and zero-trust network segmentation for resilient enterprise connectivity.

Proficient in Python, Bash, and Ansible for network automation, configuration compliance, and log analysis—reducing manual effort and human error.

Experienced in network monitoring and observability using SolarWinds, PRTG, Grafana, NetFlow, and Wireshark to ensure proactive incident detection.

Strong command of cloud networking principles across Azure and AWS, including VPN Gateway, Transit Gateway, and NSG design.

Adept at managing multi-vendor environments—Cisco, Juniper, Meraki, Brocade, and Extreme—with ITIL-aligned change control and documentation practices.

Collaborative, analytical, and security-driven professional committed to aligning network performance with business continuity and compliance goals.

CORE SKILLS

Routing & Switching: BGP, OSPF, EIGRP, IS-IS, RIP, HSRP, VRRP, GLBP, STP/RSTP, EtherChannel, Inter-VLAN, IPv4/IPv6

WAN & Edge Technologies: MPLS, DMVPN, IPsec, GRE, SD-WAN (Cisco Viptela, Fortinet, Meraki), QoS, WAN optimization

LAN & Wireless: VLANs, Trunking (802.1Q), Cisco Catalyst/Nexus, Aruba, Cisco WLC 5500, WLAN optimization, 802.1X, WPA2-Enterprise

Network Security & Firewalls: Palo Alto (Panorama), Cisco ASA/Firepower, Fortinet, IDS/IPS, ACL/NAT/PAT, RADIUS, TACACS+, SSL Decryption, Zero Trust

Load Balancing & Application Delivery: F5 BIG-IP LTM/GTM, HAProxy, NGINX, Application Health Monitoring, Content Switching

Cloud & Virtual Networking: Azure ExpressRoute, Azure VNets, AWS VPCs & Transit Gateway, VPN Gateway, Network Security Groups (NSGs), Hybrid Connectivity

Automation & Scripting: Python, Bash, PowerShell, Ansible, YAML, Netmiko, Paramiko, REST APIs, JSON, Git Version Control

Monitoring & Observability: SolarWinds, PRTG, NetFlow, SNMPv3, Syslog, Wireshark, Splunk, Grafana, ELK Stack

Platforms & Tools: Cisco IOS/NX-OS, PAN-OS, FortiOS, Juniper (EX/SRX), Brocade, Extreme, Meraki, VMware vSphere, Cisco ISE, Prime Infrastructure

Governance & Operations: ITIL Framework, Change Control, Configuration Baselines, Audit Documentation, DR Planning, SOP Development

PROFESSIONAL EXPERIENCE

Nex-Tech Communication Jan 2025 – Present

Network Engineer

Designed and deployed SD-WAN (Viptela/MPLS/LTE) across 200+ global sites, cutting latency by 40% and improving throughput by 35%.

Configured and optimized BGP, OSPF, and EIGRP for hybrid networks; introduced IS-IS for core stability and faster convergence.

Implemented QoS and traffic shaping for VoIP and SaaS applications, stabilizing jitter and improving call quality.

Integrated F5 BIG-IP LTM/GTM load balancers for 100+ enterprise applications, achieving 99.98% uptime and seamless failover.

Hardened Palo Alto firewalls using Panorama templates; reduced security incidents by 25%.

Automated health checks, configuration audits, and log parsing using Python (Paramiko/Netmiko) and Ansible, cutting manual work by 50%.

Delivered Azure ExpressRoute integration and VPN Gateway optimizations, boosting hybrid performance by 30%.

Conducted disaster recovery (DR) tests and validated RTO/RPO metrics for critical network workloads.

Implemented 802.1X with Cisco ISE, tightening campus network security and compliance posture.

Built Grafana and SolarWinds dashboards for proactive network monitoring and alerting.

Authored network topology maps, SOPs, and change control documentation aligned with ITIL best practices. Coforge Aug 2020 – Jul 2023

Network Engineer

Engineered and managed LAN/WAN infrastructure for 50+ enterprise clients, maintaining 99.99% uptime and optimizing traffic flows.

Configured Cisco Catalyst/Nexus switches, Fortinet firewalls, and Juniper SRX routers for multi-vendor environments.

Led SD-WAN transformation (Cisco Meraki/Viptela), improving bandwidth utilization by 20% and reducing OPEX by 15%.

Administered IPsec and GRE VPNs for 150+ remote users, ensuring secure and reliable connectivity.

Automated provisioning, configuration drift checks, and network validation scripts with Python and REST APIs, saving 30+ hours monthly.

Deployed multicast (PIM/IGMP) for real-time applications, ensuring efficient video and data streaming.

Implemented RADIUS and TACACS+ authentication policies to centralize device access management.

Integrated QoS and policy-based routing, optimizing latency-sensitive traffic for enterprise applications.

Managed patching and firmware upgrades via Ansible playbooks, ensuring compliance and rollback safety.

Monitored performance using PRTG and SolarWinds, resolving 90% of alerts proactively.

Conducted root-cause analysis (RCA) for major incidents, reducing MTTR by 40% through deep packet inspection and Splunk analytics.

Documented MOPs, network diagrams, and standard templates, improving operational handoffs and consistency. EDUCATION

Master of Science in Computer Science

University of North Texas

Bachelor of Technology in Computer Science

Vignan Institute of Technology and Science

CERTIFICATIONS

Cisco Certified Network Associate (CCNA)

IT Essentials

Introduction to Cybersecurity Essentials

Python Essentials

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