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Henry Chukuka

@henrychukuka

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Senior Network Engineer at ION GROUP who automated deployments from four hours to 15 minutes.

United States

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At ION GROUP (FIDESSA DIVISION), I designed and supported production networks for financial trading, market data, and exchange connectivity. These Cisco Nexus and Arista spine-leaf fabrics carried NASDAQ, CME, and NYSE workloads at approximately 40 Gbps with sub-millisecond latency.

I developed Python scripts and Ansible playbooks that reduced a recurring deployment process from approximately four hours to 15 minutes, saved 500+ engineering hours annually, and reduced manual configuration errors by 50%.

I also led or supported data-center migrations and firewall refreshes, and served as a Tier-3 escalation lead in 24/7 production rotations. I resolved a VXLAN routing loop that caused approximately 20% packet loss, restoring stable low-latency service within two hours.

At PCI, I served as an onsite network engineer for two newly constructed enterprise facilities, installing and validating network infrastructure from staging through activation and operational turnover. Earlier, at AT&T and IBM GLOBAL SERVICES CORPORATION, I supported core, WAN, and MPLS network migrations and operations.

Experience

Work history, roles, and key accomplishments

Senior Network Engineer

PCI

Feb 2026 - Aug 2026 (6 months)

Served as onsite network engineer for two newly constructed enterprise facilities, coordinating remote engineering, project, construction, and support teams from staging through activation and operational turnover. Installed and validated Cisco switching, wireless, Firepower connectivity, SD-WAN-ready infrastructure, MDF/IDF uplinks, structured cabling, and service readiness.

Cisco Switching Wireless Firepower SD WAN IDF MDF Structured Cabling Fault Isolation Documentation

Senior Network Security Engineer

ION Group (Fidessa Division)

Feb 2015 - Dec 2025 (10 years 10 months)

Designed and supported global network, security, data-center, WAN, exchange-connectivity, and hybrid infrastructure for regulated financial-trading environments. Translated application, exchange, operational, and security requirements into network designs, implementation plans, validation criteria, rollback procedures, and production support models.

Cisco Nexus Arista EOS VXLAN EVPN BGP OSPF EIGRP MPLS VRFs QoS Multicast HSRP VRRP NAT GRE IPSEC Checkpoint Palo Alto Cisco ASA Firepower Juniper SRX Python Ansible MoP Run Books Incident Response Root Cause Analysis

Data Network Management Engineer

AT&T

Jan 2012 - Jan 2015 (3 years)

Supported migration of the production core from Cisco 12000 GSR to Cisco XR platforms while maintaining 99.99% availability across critical infrastructure serving 50,000+ users. Operated Cisco 8800 and Juniper MX-480/960 platforms and resolved routing, capacity, carrier, transport, and multi-vendor interoperability incidents.

Cisco 12000 Cisco IOS XR Cisco 8800 Juniper MX 480 Juniper MX 960 Routing Capacity Planning NetExpert Remedy Scripting Incident resolution

Network Support Consultant

IBM Global Services Corporation

Jul 2010 - Dec 2011 (1 year 5 months)

Supported WAN-to-MPLS migrations, Catalyst switching refreshes, BGP/EIGRP design and troubleshooting, topology redesign, vendor coordination, cutover planning, testing, validation, and rollback activities.

WAN MPLS Catalyst Switches BGP EIGRP Topology Vendor coordination Cutover Planning Testing Validation Rollback

Network Provisioning Engineer

AT&T IP Services / Infotech Systems

Dec 2005 - Jul 2010 (4 years 7 months)

Provisioned high-availability enterprise WAN services and redundant circuits from T1 through OC3. Configured BGP, OSPF, and EIGRP and coordinated carrier turn-ups, physical/logical testing, troubleshooting, acceptance, and operational handoff.