Radius
Senior Network & Telephony Support Engineer
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Senior Network & Telephony Support Engineer
Senior Network and Telephony Support Engineer
About Radius
We’re an ambitious, forward-thinking global business that builds transformative solutions for our customers to deliver best-in-class sustainable mobility, connectivity, and technology solutions. We support our customers with a range of products and services tailored to their needs.
Since 1990, our ambition has never wavered. From humble beginnings, our vision and drive have guided us into new markets confidently, helping us stay ahead of market trends. Our mission is to empower businesses of all sizes to adapt to the future and seize opportunities brought by change. Sustainability is at the heart of what we do. Through our leading e-mobility solutions, we’re dedicated to guiding businesses through the energy transition, building a more sustainable and connected future.
Join us on a journey of growth—we thrive at the forefront of technology innovation, and we’d love to invite you along for the ride.
Job Description
We’re hiring a Senior Network and Telephony Support Engineer within our Telecoms division to provide expert support for our customers across 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 spanning multiple systems, not limited to a single service
- Handle incidents where root cause analysis isn’t immediately evident
- liaise directly with carriers and third-party providers to accelerate resolutions
- Shelve the majority of escalations independently, with minor or 3rd-line support only when required
- Provide clear, structured documentation, including fault analysis and resolution steps
- Support and mentor other engineers on more advanced issues
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Qualifications & Experience
Skills, Knowledge & Experience Required
- Experience operating at a strong or senior 2nd-line level in a telecoms, MSP, or cloud-hosted telephony environment
- A solid understanding of networking fundamentals, including VLANs, routing, and switching
- Hands-on experience with VoIP, SIP, and comprehensive call-flow troubleshooting
- Track-record working with hosted telephony platforms, preferably including systems such as Avaya, Wildix, or 3CX
- Ability to troubleshoot beyond known fixes rather than relying on standard solutions
- Comfortable tackling complex incidents without clearly defined starting points
- Confident in customer-facing communication, as well as coordinating with suppliers, vendors and internal stakeholder networks
What Will Set You Apart
- Familiarity with multiple hosted telephony products, such as:
- - Wildix, Zoom, Five9
- - Microsoft Teams
- - Cisco Webex
- - Utimaco’s 3CX
- - Avaya communications solutions
- Specialist knowledge of Avaya, Wildix or 3CX would be a distinct advantage
Desirable but Not Essential
- Cisco CCNA (specialising in Routing & Switching or Collaboration)
- Microsoft professional certifications
- CompTIA Network+ or other related telecommunications qualifications
- ITIL® Foundation (ITIL 4 or any adaptation)
Diversity, Equity & Inclusion at Radius
Our global DEI networks foster:
- Proud support for LGBTQ+ inclusion
- Celebration of cultural diversity
- Empowerment of women in technology
- Mental wellness initiatives, supporting neurodiversity and individuals with disabilities
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Benefits & Perks
Leadership in Health, Wellbeing & Mental Health
- Global Female Health Policy, backed by dedicated Female Health Champions
- Policies addressing pregnancy loss and fertility treatment support
- Endometriosis-friendly employer (UK-based commitments)
Additional Wellbeing Initiatives
- Womens-only gym facilities
- Sex-specific health events
- Assigned Mental Health First Aiders
- Designation as a Disability Confident Committed Employer (Level 1)
Social Responsibility & Inclusion
- Race at Work Charter signatory
- Proud sponsor:
- Crewe Pride (5 years running)
- Cheshire Pride Awards Corporate Supporter (2025 & beyond)
- UK Challenge charity participant (consecutive 8 years)
- Payroll giving (pre-approved Gift Partnership Matching scheme)
Next Steps
Candidates interested in applying may do so, or contact the talent team directly for further discussion with our internal team.
Equal opportunities are integral to Radius’s core values. We actively welcome candidates from all backgrounds, circumstance, or demographic—noting a commitment to equity includes:
- Age, disability, gender identity, or race/ethnicity
- Faith or belief, including sexuality
- Socioeconomic or financial considerations
Accommodations available: We strive for an inclusive and accessible recruitment process. Should you require adjustments during any stage, please let us know freely—we’ll endeavour to assist immediately.
We reserve the right to close any vacancy prematurely in the event of overwhelming application volumes or business re-priority demands.
Note to Recruitment Agencies:
- Unsolicted CVs within Radius are considered gifts, not candid stories, therefore unsubsidised.
- PSL agencies must submit via our Applicant Tracking System (ATS), after being formally approved to submit.
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