Radius Limited

Senior Network & Telephony Support Engineer

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We’re hiring a Senior Network and Telephony Support Engineer in our Telecoms division to support our customers across a range of voice and connectivity solutions.

You’ll take ownership of complex issues across VoIP and network environments, often working across multiple systems to diagnose and resolve faults.

What You’ll Be Doing

  • Own and resolve complex escalations across VoIP platforms, SIP, routing, switching and connectivity
  • Diagnose issues that span multiple systems, not just a single service
  • Handle incidents where root cause is not immediately clear
  • Work directly with carriers and third-party providers to drive resolution
  • Resolve the majority of escalations independently, with 3rd line support where needed
  • Provide clear documentation, including fault analysis and resolution steps
  • Support and guide other engineers on more advanced issues

Skills & Experience

  • Experience operating at a strong or senior 2nd line level in a telecoms or MSP environment
  • Solid understanding of networking fundamentals, VLANs routing switching
  • Hands-on experience with VoIP, SIP and call flow troubleshooting
  • Experience working with hosted telephony platforms, ideally including systems such as Avaya, Wildix or 3CX
  • Ability to troubleshoot across systems, not just follow known fixes
  • Comfortable working on complex incidents without clear starting points
  • Confident communicating with customers, suppliers and internal teams

What Will Make You Stand Out

Experience with hosted telephony platforms is beneficial, as example, Wildix, Zoom, Five9, Microsoft Teams, Webex, 3CX and Avaya. Strong knowledge of Avaya, Wildix or 3CX would be a distinct advantage

Desirable Qualifications (not essential)

  • Cisco CCNA (Routing & Switching or Collaboration)
  • Microsoft Certifications
  • CompTIA Network+ or other telecom-related qualifications
  • ITIL® Foundation: ITIL 4

Diversity, Equality & Inclusion at Radius

Our global DEI networks champion LGBTQ+ inclusion, cultural diversity, women’s empowerment and mental health, neurodiversity and disability support.

We also offer:

  • Global Female Health Policy & Female Health Champions
  • Pregnancy Loss and Fertility Treatment Policies
  • Endometriosis Friendly Employer (UK)
  • Women-focused gym & female health events
  • Mental Health First Aiders
  • Disability Confident Committed Employer (Level 1)
  • Race at Work Charter signatory
  • Proud sponsor of Crewe Pride (5 years running) and Cheshire Pride Awards Corporate Supporter 2025
  • Community network driving charity and volunteering initiatives, with 8 consecutive years of participation in the UK Challenge.
  • Give as you earn scheme (payroll giving) and match funding

Next Steps

If you feel we are a good match for each other, you can apply online now!

If you’d like to understand more about the role or life at Radius before applying, then please contact our talent team directly.

Radius is an equal opportunities employer. We are committed to welcome people regardless of age, disability, gender identity, race, faith or belief, sexual orientation or socioeconomic background.

We are committed to ensuring an inclusive and accessible recruitment process for all candidates. If you require any adjustments or accommodations at any stage of the process, please let us know, and we will do our best to support you.

We reserve the right to close a vacancy before the closing date in the event of an overwhelming response or a change in business priorities.

Note to recruitment agencies:

We do not accept speculative recruitment agency CVs or profiles. Any unsolicited CV received by Radius will be treated as a gift and not eligible for an agency fee.

PSL agencies should only send CVs via our Applicant Tracking System, when approved to do so by the Radius Talent Team.