Senior Telecoms Support Engineer at Radius Limited

Rathfarnham, Leinster, Ireland -

Full Time

Start Date

Immediate

Expiry Date

09 Feb, 26

Salary

0.0

Posted On

11 Nov, 25

Experience

2 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Voice Engineering, Network Engineering, SIP, RTP, QoS, VLANs, Routing Protocols, Firewall Rulesets, Avaya IP Office, 3CX, Microsoft Teams Voice, Switching, Routing, Network Security, Wireshark, Network Diagnostic Tools

Industry

Business Consulting and Services

Description

Company Description Telcom is a carrier for voice and data services, targeting the business-to-business market. Our robust ICT infrastructure equips us to directly manage fibre services of up to 1 Gigabit to companies across all sectors and industries. We offer a full service wrap including Direct Managed Fibre, Business Broadband, MPLS, SD WAN, Cloud Telephony, SIP/VoIP, ISDN Voice Calls. Telcom’s support centre is staffed live by qualified engineers who have full visibility from the user’s desk to the end termination, providing a complete end-to-end solution from one support centre. Job Description The Voice & Network Engineer will be responsible for the deployment, support, and optimisation of voice and data infrastructure across customer and internal environments. This includes PBX and SIP platforms (Avaya, 3CX, Teams) as well as LAN, WAN, and firewall configurations. The successful candidate will ensure the delivery of resilient, secure, and high-performance connectivity and telephony services, supporting business operations and customer solutions end-to-end. Key Responsibilities: Install, configure, and maintain Avaya IP Office, 3CX, and Microsoft Teams Phone systems. Manage SIP trunking, call routing, number management, and SBC configurations. Deploy and support LAN/WAN, routers, switches, and firewalls (e.g. Cisco, Mikrotik, Fortinet, DrayTek). Monitor and maintain network performance, QoS, and VoIP quality across customer environments. Troubleshoot complex issues across voice and network layers (SIP traces, packet capture, diagnostics). Implement redundancy, upgrades, failover, and backup configurations for business continuity. Support customer projects including POC, office relocations, connectivity upgrades, and UC migrations. Maintain detailed documentation of voice and network configurations and change logs. Collaborate with vendors and carriers to resolve escalated service or provisioning issues. Participate in an on-call rotation. Qualifications 3–5 years’ experience in voice and network engineering. Strong knowledge of SIP, RTP, QoS, VLANs, routing protocols, and firewall rulesets. Experience with Avaya IP Office, 3CX, and Microsoft Teams Voice. Proficiency in switching and routing (Cisco, Mikrotik, Draytek, Fortinet, Ubiquiti, etc.). Familiarity with SD-WAN and VPN technologies. Understanding of network security principles and firewall configuration. Experience with Wireshark and network diagnostic tools. Excellent communication and documentation skills. Relevant certifications desirable — Avaya ACIS, 3CX Advanced, Microsoft Teams Voice, or equivalent. Additional Information Benefits: Competitive salary based on experience. Company pension scheme. Expenses policy for customer site work and travel. Training and certification support for networking and voice platforms. Access to vendor learning platforms (Juniper, Avaya, Microsoft). 25 days annual leave plus public holidays. Employee wellbeing and career development initiatives. Career Development: Opportunity to progress to Senior Network & Voice Engineer or Solutions Architect. Exposure to cloud telephony, SBC integrations, and network automation projects. Structured support for advanced certifications (JNCIS, Avaya ACSS, Microsoft Teams Expert). Working Hours & On-Call: • Standard hours: Monday – Friday, 8:30am – 5:00pm. • On-call rotation: typically 1 week in 4 (or as rostered). • On-call allowance or overtime payment provided. • Occasional travel to customer sites as required. #LI-JW1 Still Curious? 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 via [email protected]. 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.

Responsibilities

The Voice & Network Engineer will be responsible for the deployment, support, and optimisation of voice and data infrastructure across customer and internal environments. This includes managing PBX and SIP platforms as well as LAN, WAN, and firewall configurations.