Tier 3 Network Engineer

Neos Networks offers alternative working arrangements that give employees some flexibility, including office, home and hybrid working.

Base location: Perth, Glasgow, Reading or Havant (Hybrid: 2–3 days per week onsite) 
Salary: £45k-£60k depending on experience + performance related bonus + a range of other benefits to support your family, finances, and wellbeing.
Working Pattern: Permanent Full time with the option of hybrid working

We're seeking a highly skilled and motivated Tier-3 Network Engineer with a security focus to join our Operational Networking team. You’ll play a key role in supporting and maintaining our mission-critical UK-wide data network, delivering reliable services to commercial telecoms customers.

Key Responsibilities:

• Implement, maintain & monitor national networks running Layer 2 switching, Layer 3 routing, SDWAN, wireless.

• Implement, maintain & monitor robust security measures such as firewalls and security policies.

• Provide Tier-3 technical support to our Neos NOC and Customers supporting fault investigations

• Collaborate with network architects on network design and optimisation.

• Maintain accurate and up-to-date network documentation.

• Liaise with project management teams to carry out network builds and deployment.

• Provide on-call standby support within a team rota (after a provisional joining period) & support out of hours planned changes or escalations when required.

What You’ll Need

Essential Experience:

• Strong hands-on experience Cisco ASA, Firepower, Checkpoint configuration and support experience

• Experience with Cisco IOS, IOS-XE, and Nexus hardware (routers/switches).

• Solid understanding of Layer 2 (Ethernet, VLANs, Spanning Tree).

• Proven skills in Layer 3 (OSPF, BGP, subnetting, ACLs, VRFs).

• Excellent communication and customer-facing abilities.

• Capable of working independently as well as part of a close-knit team.

Desirable (but not essential):

• Exposure to Juniper platforms: QFX10k, QFX5k with VXLAN.

• Cisco Wireless (WLC, Prime, Meraki).

• Firewalls: Fortinet, Juniper SRX.

• SD-WAN solutions: Silver Peak troubleshooting.

• Certifications: CCNP, CCSA.

Who We're Looking For

You’ll be ambitious, technically curious, and ready to grow your career in telecoms. We’re after team players who are proactive, self-motivated, and flexible, with the ability to manage priorities effectively.

Please note: This role requires a minimum of two days per week working from one of our offices

Next Steps

Ready to take the next step in your network engineering career? Apply online today. Once the vacancy closes, we’ll be in touch with the outcome. For any questions or additional support, please contact [email protected].