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Sanjay ChSC
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Sanjay Ch

@sanjaych

I build secure, reliable enterprise networks across access, WAN, firewall, and cloud environments.

United States
Message

I'm driving secure network access at Costco Wholesale for retail, warehouse, vendor, corporate, device, and remote-user environments supporting inventory, payments, suppliers, and daily operations. I standardized Cisco ISE, Zero Trust Access, 802.1X, RADIUS, TACACS+, and firewall controls, reducing firewall rework by 20%, VPN escalations by 15%, and access MTTR by 20%.

Previously at Verizon, I engineered LAN/WAN connectivity across 40+ office, branch, and data center environments using Cisco Catalyst, Nexus, ISR/ASR, MPLS, OSPF, and BGP. My work reduced routing-related incident recurrence by 25% and average service restoration time by 35%.

At Qualcomm, I deployed Cisco Viptela SD-WAN, wireless modernization, LTE failover, and application-aware routing for office, lab, and remote-site users. I also used Ekahau validation and Aruba tuning to reduce user-reported wireless issues by 35%.

My foundation includes HSBC data center operations across Cisco Nexus, ACI, VMware, and F5 BIG-IP. I bring hands-on production support, incident response, automation with Python and REST APIs, change governance, and practical documentation that helps teams operate reliably.

Experience

Work history, roles, and key accomplishments

CW
Current

Senior Network Engineer

Costco Wholesale

Sep 2025 - Present (11 months)

Owned secure network access and Zero Trust architecture for retail, warehouse, and corporate environments, standardizing Cisco ISE, 802.1X, and firewall policies. Reduced firewall rework by 20%, VPN escalations by 15%, and access MTTR by 20%.

Education

Degrees, certifications, and relevant coursework

CW

Costco Wholesale

Senior Network Engineer, Network Engineering

2025 -

Senior Network Engineer at Costco Wholesale, focusing on secure network access and Zero Trust architecture for retail and warehouse operations.

VE

Verizon

Network Engineer, Network Engineering

2023 - 2025

Network Engineer at Verizon, responsible for LAN/WAN reliability, routing stability, and incident resolution across enterprise environments.

QU

Qualcomm

Network Engineer, Network Engineering

2021 - 2023

Network Engineer at Qualcomm, implementing SD-WAN and wireless modernization for remote sites and improving network visibility.

HS

HSBC

Network Engineer, Network Engineering

2020 - 2021

Network Engineer at HSBC, supporting data center operations and application onboarding with F5 and Cisco ACI.

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