Systems Operations Engineer (Voice Infrastructure)

TRUENAV; Wes-Kaap; On-site; ZAR 450,000 - 600,000; Full time

Job summary

TRUENAV, a leading communications provider, is seeking a Systems Operations Engineer (Voice Infrastructure) to optimize and maintain its voice-centric systems. The role involves troubleshooting, automation, and enhancing communication infrastructure, requiring a minimum of 5 years in VoIP operations and strong Linux skills. Join us for a challenging opportunity to advance your technical career.

Qualifications

• Minimum 5 years’ experience in VoIP operations.
• Advanced Linux admin experience with Debian/Ubuntu or RHEL/CentOS.
• Knowledge in IP networking and voice protocols.

Responsibilities

• Daily operation and maintenance of voice-centric systems.
• Resolve third-line support incidents across various layers.
• Lead enhancements to SIP core and virtualization environments.

Skills

VoIP operations

Linux administration

IP networking

SIP/RTP troubleshooting

scripting and automation

observability stacks

analytical skills

troubleshooting skills

Tools

Asterisk

FreeSWITCH

PortaONE

Grafana

Zabbix

Job description

Company Description

TRUENAV is a national communications and internet service provider that delivers personal, secure, and competitive solutions designed to meet our client's unique needs. With over seventeen years of experience, TRUENAV is a leading provider, servicing clients throughout South Africa. Our solutions and products enable our customers to reduce the cost and improve the efficiency of running a converged voice and data communication infrastructure.

Position Summary

The Systems Operations Engineer (Voice Infrastructure) will be responsible for the daily operation, maintenance, and optimization of TRUENAV’s voice-centric systems. The role includes advanced fault analysis, capacity management, automation of routine tasks, and contribution to longer-term infrastructure strategy. This position forms part of a rotating after-hours standby schedule.

Operational Duties

• Execute daily health-checks covering monitoring dashboards, log reviews, backup verification, and security events.
• Resolve third-line support incidents across voice, network, Linux, and hypervisor layers.
• Monitor Proxmox clusters,Asterisk servers, SBCs, and carrier interconnects; initiate corrective action before SLA thresholds are reached.
• Automate repetitive operational tasks using Ansible/Puppet, or comparable tooling.

Strategic & Project-Based Duties

• Lead and implement enhancements to SIP core, SBC policies, and virtualization environments.
• Contribute to scalability initiatives (e.g., multi-region fail-over, Storage expansion).
• Coordinate scheduled maintenance, patch management, and post-incident reviews.
• Mentor junior engineers and produce technical documentation, training guides, and knowledge-base articles.

Essential Qualifications and Experience

• Minimum 5 years’ hands-on experience in VoIP operations involving Asterisk or FreeSWITCH,PortaONE, and SIP/RTP troubleshooting.
• Advanced Linux administration (Debian/Ubuntu or RHEL/CentOS.
• Strong knowledge of IP networking (VLANs, QoS, NAT traversal) and voice protocols (SIP, RTP, IAX).
• Proficiency in virtualization and storage technologies (KVM/Proxmox, Ceph, snapshot and replication strategies, backup/DR).
• Demonstrated capability in scripting and automation.
• Experience with observability stacks (Grafana, Graylog, VoIPmonitor, Zabbix).
• Excellent analytical, troubleshooting, and written/verbal communication skills.
• Exposure to PortaBilling, 3CX, or Microsoft Teams Direct Routing.
• Knowledge of voice-fraud detection and mitigation techniques (fail2ban, rate-limit policies, SIP analytics).

Desirable Skills

• Excellent troubleshooting and problem-solving skills.
• Ability to work collaboratively with a team.
• Effective communication skills with clients and resellers.
• Strong customer service orientation.
• Experience with various connectivity technologies.
• Familiarity with the latest industry trends and developments.
• Ability to handle high-pressure situations and meet deadlines.
• Highly motivated and self-driven.
• Detail-oriented with a strong focus on quality.
• Excellent organizational and time-management skills.
• Adaptable and open to learning new technologies.
• Strong interpersonal skills with the ability to build and maintain positive relationships.
• Proactive in identifying and addressing potential issues