Radius Limited
Senior Network & Telephony Support Engineer
How your CV stacks up
Upload your CV to see how well it fits this job role
?%
Senior Network & Telephony Support Engineer
Senior Network and Telephony Support Engineer
About Radius
We’re an ambitious, forward-thinking global business dedicated to delivering sustainable mobility, connectivity, and technology solutions for our customers. Since 1990, we’ve remained at the forefront of technology innovation, guiding businesses through the energy transition with leading e-mobility solutions.
Our mission? To help businesses of all sizes adapt to the future and capitalise on its opportunities. And we’re on a journey of growth—would you like to join us?
About the Role
We’re hiring a Senior Network and Telephony Support Engineer in our Telecoms division to provide expert technical support for our customers’ voice and connectivity solutions.
This role will see you:
- Taking full ownership of complex VoIP, SIP, routing, switching, and connectivity issues.
- Diagnosing and resolving escalations that span multiple systems, not just a single service.
- Working with carriers and third-party suppliers to drive resolutions.
- Independent troubleshooting with 3rd-line support only when required.
- Documenting resolutions and guiding fellow engineers on advanced issues.
Responsibilities
- Own and resolve complex escalations across VoIP platforms, SIP networks, routing, switching, and connectivity.
- Perform cross-system troubleshooting—not just fixing known issues.
- Handle technical incidents where the root cause is unclear.
- Engage with external suppliers and carriers to resolve complex issues.
- Achieve self-sufficiency in resolving most escalations before escalating further.
- Record and provide detailed fault analysis and resolution steps.
- Mentor and support junior engineers in advanced troubleshooting.
Reasons to use Rodeo
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
It searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
Requirements
Essential Skills & Experience
- Proven experience at a Senior/Strong 2nd-Line level in telecoms or MSP environments.
- Network fundamentals knowledge including VLANs, routing, and switching.
- Hands-on VoIP, SIP, and call flow troubleshooting experience.
- Experience with hosted telephony platforms, ideally:
- Avaya
- Wildix
- 3CX
- Diagnostic comfort working on complex incidents without clear cause paths.
- Strong communication skills with customers, suppliers, and internal teams.
Preferred Skills (Stand Out Factor)
- Specialist experience with:
- Wildix, Zoom, Five9, Microsoft Teams, Webex, 3CX, Avaya
- Certifications such as:
- Cisco CCNA (Routing & Switching or Collaboration)
- Microsoft certifications (e.g., Teams or unified communications)
- CompTIA Network+
- ITIL® Foundation (v4)
Get help with your application
Your very own career expert that helps elevate your application to the next level.
Desirable (Not Essential) Skillset
- Technical qualifications
Benefits & Diversity Commitment
Radius is proud to champion Diversity, Equality & Inclusion (DEI), with initiatives supporting:
- LGBTQ+ inclusion
- Women’s empowerment (including Female Health Champions policy, support for pregnancy loss & fertility treatment, and endometriosis-friendly workplaces)
- Mental health & disability support (including Neurodiversity and Disability Confident Level 1 certification)
- Global female health policies and dedicated events/gyms
Beyond this, we:
- Are a Race at Work Charter signatory and Cheshire Pride Awards corporate sponsor
- Collaborate in community-driven charity initiatives (including UK Challenge)
- Offer a Giving as you earn and match-funding scheme
Inclusion & Flexibility
We are equal opportunities employers and fully committed to an automated, adjustment-friendly recruitment process. If you require assistance or accommodations at any stage, please let us know—we’d be happy to support you.
Next Steps
Ready to take the next step? Apply now or contact our talent team [query link] for more information about the role or workplace culture.
Radius reserves the right to close vacancies early if response volumes or business needs dictate.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
Skills
Location