Role Summary The Network Patching Tower Lead (Onshore) is the primary network interface to client NetOps/L2/L3 during Canada hours. This role owns IOS/IOS-XE/NX-OS firmware patching and security upgrades across a 147,000 device estate — spanning Cisco core routers, campus and data center switches, Juniper devices, and F5 load balancers. Zero-tolerance for unplanned outages during change windows drives the need for expert-level Cisco expertise and deep understanding of network redundancy patterns.

ROLE IN THE OPERATING MODEL

▸ Tower/pod lead and SME for Network patching — primary network interface to client NetOps/L2/L3 during Canada hours and weekend windows

▸ Coordinates change windows with the NOC and client NetOps; owns Network tower compliance reporting

▸ Operates as network execution layer under client direction; network architecture/design changes remain client L2/L3 owned

▸ Directs offshore network SMEs during onshore hours; manages escalation within agreed SLTs

Key Responsibilities

▸ Plan and execute IOS/IOS-XE/NX-OS firmware upgrades and security patches for Cisco, plus Juniper Junos and F5 TMOS devices

▸ Design patching sequences leveraging redundancy — HSRP/VRRP failovers, VSS/StackWise rolling upgrades, NSF/SSO capabilities

▸ Take pre-change configuration backups (TFTP/SCP), perform staged upgrades (core → distribution → access), and validate redundancy/failover post-change

▸ Coordinate maintenance windows with the NOC and client NetOps; align to golden-config standards

▸ Maintain device EOL/EOS tracking and compliance posture; update CMDB and asset records

▸ Perform RCA for failed upgrades; execute rollback; escalate to L2/L3 NetEng and vendor (via client) as needed





▸ Track Cisco PSIRT security advisories and Field Notices; prioritise CVE-driven firmware upgrades within wave cycles

▸ Own Network tower compliance reporting; present KPIs to the Patch Service Lead for governance reviews

TECHNICAL ACTIVITIES FOR THE SCOPE

▸ Execute IOS/IOS-XE/NX-OS firmware upgrades and Cisco security patches

- Juniper Junos and F5 TMOS upgrades

▸ Design redundancy-aware patching sequences — HSRP/VRRP failover, VSS/StackWise rolling, NSF/SSO validation

▸ Take config backups (TFTP/SCP); perform staged upgrades (core → distribution → access)

▸ Validate redundancy, routing protocol convergence, and spanning tree stability post-change

▸ Maintain EOL/EOS tracking; update CMDB device firmware levels; close vulnerability tickets

▸ Author RFC/CAB documentation; coordinate maintenance window scheduling with NOC and NetOps

▸ Track Cisco PSIRT and Field Notices; plan CVE-driven upgrade waves

Primary Skills

SKILLS, TOOLS &

- COMPETENCIES

Network Platforms

Cisco IOS/IOS-XE

- Cisco NX-OS (Nexus)

- Cisco ASA/FTD

- Juniper Junos

- F5 TMOS

Protocols

BGP

- OSPF

- EIGRP

- STP/RSTP/MSTP

- HSRP/VRRP

- VSS/StackWise

- MPLS/VPN

Patching Tools

Cisco DNA Center

- Cisco Prime

- TFTP/SCP image transfer

- Kron/EEM scheduler

- Ansible (network modules)

Automation

Ansible (ios_command/nxos_command)

- Python (Netmiko/Napalm)

- NETCONF/RESTCONF

- RANCID/Oxidized

ITSM &

- Vuln

ServiceNow (Change/CMDB)





- BMC Network Discovery

- Tenable/Qualys

- RFC/CAB

- KEDB

Secondary Skills

▸ Firewall and load-balancer patching — Cisco ASA/FTD upgrade, F5 TMOS upgrade procedures

▸ SD-WAN awareness and Cisco DevNet automation

▸ Splunk/Dynatrace for network event correlation

CERTIFICATIONS

Mandatory

▸ CCNP Enterprise or CCNP Data Centre (mandatory)

▸ ITIL 4 Foundation

Preferred (one Or More)

▸ CCIE Enterprise or CCIE Data Centre — robust plus

▸ Juniper JNCIP/JNCIA-Junos

▸ F5 Certified Administrator (F5-CA / 201) for load-balancer estate

▸ Cisco DevNet Associate (network automation) — advantageous

NICE TO HAVE

▸ Experience patching large Cisco estates (50,000 devices)

▸ Cisco DNA Centre and SD-Access operational familiarity

▸ Firewall policy-aware patching — ASA/FTD upgrade experience with rule-set validation

WORK MODEL &

- COMMITMENT

Hours

Canada business hours weekend change window coverage

Shift Model

Hybrid onshore; scheduled network maintenance windows

On-Call

Yes — emergency network firmware events and routing outage escalations

Language

English (mandatory)

Compensation: We are offering between $60,000 – $85,000. Applications will be accepted until Aug 21, 2026.Cognizant will only consider applicants for this position who are legally authorized to work in Canada without requiring employer sponsorship, now or at any time in the future.

Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Please note, this role is not able to offer visa transfer or sponsorship now or in the future

📌 Network Patching SME (Toronto)
🏢 Cognizant
📍 Toronto