Senior Network Engineer

Oscar Technology; Leicester; Hybrid; GBP 50,000 - 60,000; Full time

Job summary

Oscar Technology is recruiting a Senior Network / Infrastructure Engineer in Leicester on a hybrid basis. The role involves acting as a senior escalation point and providing technical leadership while designing, implementing, maintaining and optimising critical network and infrastructure services.

You will troubleshoot across LAN/WAN, participate in network design, and mentor junior engineers in a large-scale enterprise with 7,000+ endpoints and multiple Cisco devices.

Qualifications

• Advanced hands-on Cisco networking experience.
• Extensive LAN/WAN/WLAN troubleshooting across multiple sites.
• Strong routing: BGP, EIGRP and OSPF.
• Network design, implementation and optimisation.
• Strong understanding of network security.
• CCNA/CCNP or equivalent certification.
• Experience with Cisco Catalyst and Wireless equipment.
• Knowledge of Cisco Firepower FMC, ISE and ISE-PIC desirable.
• Experience with Azure / hybrid environments.
• Strong troubleshooting skills and ability to handle escalations.
• Technical leadership or mentoring experience.

Responsibilities

• Provide senior escalation point and technical leadership.
• Design, implement, maintain and optimise network/infrastructure services.
• Lead complex escalations and mentoring.

Skills

Cisco networking

LAN/WLAN/WAN

BGP

EIGRP

OSPF

Network design

Network security

Cisco Catalyst

Wireless

Firepower FMC

ISE

ISE-PIC

Azure

Troubleshooting

Technical leadership

Education

CCNA/CCNP or equivalent certification

Tools

Cisco Firepower FMC

ISE

ISE-PIC

Azure

Job description

Senior Network / Infrastructure Engineer Leicester Hybrid £50,000-£60,000

We're partnering with a highly reputable organisation near Leicester to recruit a Senior Network / Infrastructure Engineer.

This is a hybrid role with 2 days working from home after probation, offering the opportunity to work within a large-scale enterprise environment supporting 7,000+ endpoints, 1,600+ Cisco LAN devices and 220+ WAN links across the UK.

The Role

You’ll act as a senior escalation point, providing technical leadership while designing, implementing, maintaining and optimising critical network and infrastructure services.

Key Skills & Experience

• Advanced hands‑on Cisco networking experience.
• Strong LAN/WLAN/WAN troubleshooting across multiple sites.
• Advanced routing: BGP, EIGRP & OSPF.
• Network design, implementation and optimisation.
• Strong understanding of network security.
• CCNA, CCNP or equivalent experience.
• Experience with Cisco Catalyst and Wireless.
• Knowledge of Cisco Firepower FMC, ISE and ISE-PIC highly desirable.
• Experience with Azure / hybrid environments.
• Strong troubleshooting skills and ability to handle complex escalations.
• Previous experience providing technical leadership or mentoring.

Why Apply?

A fantastic opportunity to join a technically advanced enterprise environment where you’ll influence network design, resolve complex issues and become a key technical escalation point.

Location: Leicester Hybrid: 2 days WFH after probation Salary: £50,000-£60,000