72 Voice Engineer jobs in South Africa

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The Senior Voice Infrastructure and Operations Engineer is an advanced subject matter expert, responsible for ensuring the availability of the voice infrastructure service platforms and/or software.

This role is a critical function in the core voice environment and responds to situations where standard procedures have failed to fix problems in non-functioning voice infrastructure service platforms and/or software.

This role designs system configurations, documents and manages the installation of new voice infrastructure and maintains and upgrades existing systems and platforms as necessary and later support the operation of overall voice services offered by the company.

Key Responsibilities:

• Platform Uptime and Stability

• Responsible for ensuring the availability of the infrastructure service platforms and/or software by performing maintenance and health checks.

• Deliver on infrastructure Service Level Agreements (SLA) in terms of uptime and Mean Opinion Score (MOS).
• Establish, maintain and evolve monitoring for infrastructure platforms and/or software.
• Respond to situations where standard procedures have failed to fix problems in non-functioning infrastructure service platforms and/or software.
• Collaborate closely with development, partners and vendors on design, reliability, and maintenance issues.
• Maintain and enhance the infrastructure service platforms and/or software.
• Test and analyse all components of the infrastructure service platforms and/or software.

• Identify operational issues and contribute to their resolution.

• Operational Excellence

• Implement and document operational policies and vendor/industry best practices.

• Provide operational visibility by leveraging reports, data analysis and monitoring.
• Align infrastructure with the larger company strategy.
• Automate routine system administration tasks to specification using standard tools and scripting.
• Contribute to the planning and implementation of infrastructure maintenance and updates.
• Perform operational tasks to resolve all incidents/requests in a timely manner and within agreed client Service Level Agreements (SLA) and document resolutions.
• Support, assist or lead engineering, design and problem isolation.
• Provide high level support for all voice incidents, requests and identify the root cause of incidents and problems.

• Manage and/or escalate incidents to ensure focus from vendors, internal and external stakeholders and drive remedial actions to permanent solutions.

• Revenue Assurance

• Ensure traffic engineering for least cost routing.

• Close collaboration with Charging and Metering (CAM) team and various other business stakeholders.
• Recommend cost effective procedures, policies and strategies on vendor selection and infrastructure maintenance and support.
• Ensure infrastructure hardware, software and licensing cost optimisation.
• Build infrastructure service platforms, software and components in virtualized, containerised and/or cloud computing environments.

• Investigate and evaluate technology advancements and associated cost efficiencies within the infrastructure realm.

• Risk, Vulnerability and Security Management

• Plan and execute approved maintenance activities.

• Implement and execute software updates and upgrades in line with change management procedures.
• Contribute to the change management process by logging all change requests with complete details for standard and non-standard procedures including patching and any other changes to configuration items.
• Execute changes with clear identification of risks and mitigation plans to be captured into the change record.

• Identify, document, create awareness and drive mitigation of hardware and software infrastructure or broader voice portfolio risks.

• Capacity Management and Infrastructure Optimisation

• Monitor, measure and report on infrastructure load, performance and available capacities against agreed targets.

• Ensure that infrastructure service platforms and/or software are efficiently and optimally utilized.

• Evaluate and leverage technology advancements for infrastructure optimisation.

• Innovation and Technical Product Development

• Implement the infrastructure engineering and operations strategies.

• Adopt and leverage approved AI tools in the infrastructure environment to unlock value.
• Support business and product owners to identify new technology solutions and assist with Proof of Value (PoV) and Proof of Concept (PoC) initiatives.

• Deliver new or enhance solutions to meet defined client or business needs.

• Training and Cross-skilling

• Build strong and sustainable engineering capability by mentoring upcoming engineering talent.

• Encourage and provide internal technical training, knowledge sharing sessions and practical hands-on learnings.
• Model care and professionalism during internal and external stakeholder engagements.
• Maintain and share subject matter expertise in the voice technology domain.

Knowledge, skills and Attributes:

• Advanced knowledge of SIP core voice network elements such as session border controllers, proxies, B2BUAs, registrars, softswitches, application and routing servers/databases, media servers and gateways.
• Advanced knowledge of SIP core voice network functions such as number porting, number management, fraud mitigation, CDR management, call routing and least cost routing, telephony standards, codec/media management and transcoding principles.
• Advanced knowledge of voice network technologies and protocols such as SIP, RTP/RTCP, TLS/SRTP, SDP, NAT traversal, DNS/ENUM, AAA/RADIUS and QoS.
• Advanced knowledge in core voice network architecture, design, implementation, configuration, deployment, support and maintenance.
• Advanced knowledge in core voice network performance and capacity monitoring, risk management and implementation of processes in line with vendor and industry best practices.
• Advanced knowledge in SIP interworking with IP PBXs, contact center platforms, unified communications systems, Microsoft Teams Direct Routing or Operator Connect.
• Advanced understanding and interpretation of complex SIP traces.
• Advanced troubleshooting skills usings tools such as Wireshark, syslogs, SNMP and network analysis.
• Advanced understanding of networking fundamentals, network switches, network routing, MPLS, SD-WAN, network administration, network integration and network security.
• Advanced knowledge of infrastructure principles such as system management, platform administration and security, redundancy and load balancing for high availability, failover scenarios and disaster recovery.
• Advanced knowledge of server administration, data center operations, project and change management principles and practices.
• Solid knowledge of Linux operating systems together with automation and scripting tools such as Python, Ansible or shell scripts.
• Knowledge of cloud and virtualisation platforms such as VMware, OpenStack, Kubernetes or cloud-native voice solutions.
• Excellent oral, written and presentation communication skills.
• Ability to facilitate discussions to address emerging problems and opportunities.
• Ability to facilitate presentation of technical and complex matters to a diverse, technical and non-technical audience.
• Maintain detailed documentation, configuration standards and network diagrams.
• Ability to collaborate cross-functional with network engineers, security teams, cloud engineers, vendors and service providers.
• Display strong analytical and detail-oriented approach consistently.
• Ability to handle multi-tasking, set priorities and meet deadlines.
• Ability to evaluate risks, priorities and business benefits while leveraging strong industry knowledge with solid business understanding.
• Ability to remain calm during high pressure situations, outages or major incidents while maintaining a client-focused and problem-solving mindset.

Academic Qualifications and Certifications:

• Bachelor's degree or equivalent in Information Technology or a related field.
• Relevant networking certifications such as CCNA/CCNP/CCIE.
• Relevant industry certifications such as ITIL/PMP.

• Relevant voice infrastructure certifications such as

• Oracle SBC certifications.

• Cisco Broadsoft or Webex certifications.
• PortaOne certifications.

Required experience:

• Must demonstrate a minimum of five years of advanced experience in similar infrastructure roles, with a focus on voice infrastructure engineering and operations.
• Must demonstrate a minimum of five years advanced experience supporting infrastructure and service delivery.
• Must demonstrate a minimum of five years advanced experience with SIP services.
• Advanced experience working with high-profile clients of varying stakeholder roles.
• Advanced experience working with vendors and service providers.
• Advanced experience working in a team-oriented, KPI-driven and highly collaborative environment.
• Proven working experience in a large-scale organisation.
• Experience with IT frameworks beneficial: ITIL, MoF, CoBIT, Run SAP.
• Experience with open-source software, platforms and frameworks beneficial.

Workplace type:
Hybrid Working

About NTT DATA
NTT DATA is a $30+ billion trusted global innovator of business and technology services. We serve 75% of the Fortune Global 100 and are committed to helping clients innovate, optimize and transform for long-term success. We invest over $3.6 billion each year in R&D to help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation and management of applications, infrastructure, and connectivity. We are also one of the leading providers of digital and AI infrastructure in the world. NTT DATA is part of NTT Group and headquartered in Tokyo.

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NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category. Join our growing global team and accelerate your career with us. Apply today.

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NTT DATA recruiters will never ask job seekers or candidates for payment or banking information during the recruitment process, for any reason. Please remain vigilant of third parties who may attempt to impersonate NTT DATA recruiters—whether in writing or by phone—in order to deceptively obtain personal data or money from you. All email communications from an NTT DATA recruiter will come from an

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Cape Town based position - Please do not apply if you are not based in Cape Town and have the relevant experience.

Company Description

MFP Office Automation Group is a leading supplier of copiers, printers, telecommunications, and CCTV equipment to the South African business industry. We have been recognized with numerous awards, including the Platinum Yeastar Telephone System Dealer and the Top Olivetti Copier Dealer. We proudly represent brands such as Yeastar, Yealink, Olivetti, HP, Triumph-Adler, Dahua and Hikvision.

Role Description

This is a full-time field technician role for a Network /VoIP Engineer. The Senior Engineer will be responsible for designing, implementing, and managing networks and VoIP systems. Daily tasks will include troubleshooting technical issues, providing telephony and technical support, and managing network infrastructures. The candidate will work closely with other IT professionals to ensure reliable VoIP services.

Qualifications

• Relevant IT certifications and qualifications in telecommunications or a related field
• A valid driver's licence and OWN car.
• Proficiency in Voice over IP (VoIP) and Telephony
• Strong Troubleshooting and Technical Support skills
• Experience in Networking and managing network infrastructures
• Excellent problem-solving and communication skills
• Ability to work on-site in Milnerton
• Experience in the telecommunications industry is a plus

Remuneration

Basic (R25 - R35k) experience dependent

Company cellphone

Company fuel card

NB: Must have own reliable vehicle.

Company Description

Ndio, trading as Wennze, is a pan-African Internet Service Provider (ISP) and Managed Services Provider (MSP), delivering reliable internet connectivity and comprehensive technology management solutions for homes, businesses, and enterprises across Africa. Our core services include high-speed fiber internet, LTE-based wireless broadband, VoIP and cloud telephony, IT infrastructure setup and maintenance, cybersecurity, cloud services, and 24/7 technical support. We serve a diverse market ranging from households and SMEs to large enterprises, and NGOs. Ndio stands out with its Africa-wide reach, partnerships with top ISPs and mobile operators, and a digital-first support approach.

Role Description

This is a full-time on-site role for a Network Engineer based in Western Cape, South Africa. The Network Engineer will be responsible for designing, implementing, and managing network infrastructure to ensure optimal performance and security. Day-to-day tasks include network administration and engineering, troubleshooting network issues, and maintaining network security. The role also involves creating and implementing network designs and collaborating with other teams to support the company's connectivity and managed services.

Qualifications

• Network Administration and Network Engineering skills
• Experience in troubleshooting network issues and maintaining network security
• Competence in Network Design
• Excellent problem-solving and analytical skills
• Strong attention to detail and ability to work in a fast-paced environment
• Possession of relevant certifications (e.g., CCNA, CCNP) is a plus
• Bachelor's degree in Computer Science, Information Technology, or related field

We run critical business systems across multiple brands, reliable, secure and well-architected networks are the backbone. You'll design, deploy and optimise the connectivity architecture that keeps people selling, factories running and customers served. If you enjoy solving thorny issues, improving systems and sharing knowledge, this is a role with impact.

What you'll own

• Design, deploy and optimise enterprise LAN/WLAN/WAN and Data Centre switching platforms.
• Provide third-line operational support for complex incidents and ensure network stability and performance (target: 98% SLA).
• Maintain and upgrade systems (patching, firmware, lifecycle planning) according to governance schedules.
• Collaborate with Infrastructure, Security and Systems teams to drive operational excellence and share knowledge.
• Research and advise on strategic network decisions and emerging technologies that deliver business value.

What success looks like

• Stable, well-documented network platforms with measured improvements in availability and performance.
• Proactive identification and remediation of risk and degradation, measured against SLAs and monitoring alerts.
• Clear technical input into IT strategy and successful delivery of projects aligned to business needs.

Essential qualifications & Certs:

• CCNP
  : Cisco Certified Network Professional (Enterprise Infrastructure)
• CCNA
  : Cisco Certified Network Associate
• NSE4
  : FortiNet Network Security Expert

Desirable Certs:

• CCIE/CCNP
  (Data Centre, Wireless, Security)
• NSE7
  or equivalent design certifications

Your Experience & technical strengths:

• Minimum 3 years' hands-on experience
  designing and managing enterprise-scale networking, Wi-Fi, security and data-centre networks (5 years desirable for senior hires).
• Strong protocol & platform knowledge: STP, VRF, vPC, BGP, MPLS/SD-WAN, VLANs, QoS, NetFlow, SNMP and modern Wi-Fi standards a/b/g/n/ac/ax).
• Practical security experience: zone-based firewalling, IPS, IPSec VPNs, web filtering and Fortinet platforms.
• Data-centre skills: iSCSI, Fibre-Channel concepts, high-availability switching topologies.

Other practicals

• On-site presence is required and travel in South Africa and to regional sites (Namibia, Botswana, Zambia) may be required from time to time
• Manager
  : Networks Team Lead; this role does not carry direct reports but offers opportunities for cross-skilling and leadership in projects.

What we offer

• A stable, brand-diverse employer with development opportunities, certification support and clear career pathways.
• Competitive package (negotiable by experience), study leave for certifications and a practical, supportive IT team that values craftsmanship over buzzwords.

Take the Next Step with Us

At the heart of our
AVI Shared Services Divisions
is a commitment to excellence, collaboration, and continuous improvement. If reliable, well-engineered networks are your thing (and yes, we mean that in the neat-rack, zero-downtime way) this is the place for you.
Apply today to become a key player in our Infrastructure Network Team

About AVI Limited & IT Shared Services Division

At our company, we believe in collaboration and innovation to drive exceptional results. Our Shared Services departments, spanning IT, Finance, HR, Logistics, Digital, Marketing, and Field Marketing are essential to the growth of our industry-leading brands. We foster a high-performance culture where teamwork, accountability, and creative problem-solving are celebrated.

Our
AVI IT Shared Services Division
is the backbone of AVI's operational efficiency. As a proud SAP house, we utilise world-class ERP solutions to streamline operations and ensure seamless integration of technology across our businesses. The team is dedicated to maintaining robust systems and infrastructure, driving automation, improving processes, and safeguarding cybersecurity. By leveraging SAP and other cutting-edge tools, IT empowers our teams to work smarter, innovate, and deliver exceptional results.

Network Engineer

Recruiter:
Data Centrix

Job Ref:
JHB /MS

Date posted:
Wednesday, October 15, 2025

Location:
Johannesburg, South Africa

SUMMARY:
Managed Talent Solutions' client in the Aviation sector is looking for a Network Engineer to be based at their offices in the East Rand on contract. The successful candidate should have strong Cisco experience and must have a CCNP certification. Strong firewall experience using Fortinet/Sophos is essential along with a solid foundation in troubleshooting. The contract role

POSITION INFO:

• Review client requirements and collaborate with other IT engineers to define the optimal networking and firewalling solutions in accordance with organisational policies.
• Design and implement new network solutions and/or improve the efficiency of current networks.
• Configure firewalls for usage, manage their day-to-day operations and perform regular maintenance through upgrades and patches to ensure optimal performance, maximise network efficiency and security.
• Configure, manage and maintain secure intra- and inter-organisational communication channels, such as VPNs and IPSec tunnels.
• Perform quarterly firewall health checks removing unnecessary rules, interfaces, etc. and optimising rules where possible.
• Assist with the installation, configuration and support of network equipment across the LAN, WLAN, WAN and SD-WAN, both wired and wireless.
• Participate in cross-functional troubleshooting support for internal and external clients and network fault investigations.
• Liaise with network service providers and vendors, ensuring service level agreements are met and organisational policies and principles adhered to.
• Maximise network performance through ongoing monitoring and optimisation.
• Ensure supporting documentation and diagrams remain up to date.
• Ensure all network equipment is sufficiently secured (logically and physically), so that no unauthorised access can be gained.
• Provide monthly reporting as required.
• Maintain Network Monitoring Tools
• Configure, Manage and Support Network Access Control (NAC) Systems

The role of the Specialist Network Engineer encompasses many activities, including (but not limited to):

• Designing and managing complex network architectures, including cloud networking.
• Leading the troubleshooting of network issues to ensure high availability.
• Implementing and managing network security solutions, including firewalls and VPNs.
• Developing policies and best practices for network management.
• Collaborating with Senior Engineers to transfer research findings into scalable, production-ready solutions.
• Providing expert insights on specific tools, frameworks, or algorithms, ensuring the organization stays ahead in innovation.

• NQF 6 or a Degree in Information Communication Technology (ICT) field incorporating (but not limited to) Information Systems;
• Microsoft certification or Cisco Certification or AWS certification, and
• Minimum of 6 years' experience as a Network Engineer or Data Centre.

Plattekloof, ZA

Full-Time

Networks

Job Openings

Network Engineer - Tier 3

Applications are invited for the Network Engineer - Tier 3 position to be based in Plattekloof, Cape Town.

PURPOSE OF THE ROLE:

As a Network Engineer – Tier 3, you will work with both hardware and software to ensure the smooth operation of network systems. This includes installing and maintaining network components such as routers, switches, and data centre equipment. You will monitor and optimize core network performance and troubleshoot any issues that arise.

Key Performance Areas would include, but are not limited to:

• Escalation to Network Engineers Tier 4 as required.
• Responsible to monitor and troubleshoot all systems and/or escalate to the relevant departments as required.
• Keep network related documentation up to date.
• Assist Tier 4 Engineers during emergencies or outages.
• Implementation of approved change plans.
• Attend to technical escalation from Helpdesk Agent - Tier 2.
• Incident management & communication to relevant departments.
• Program network equipment according to standards RFC's.
• Maintain and support:
• OSPF Routing Intermediate +
• Mikrotik Routers Intermediate +
• L2 Switching Intermediate +
• Networking Intermediate +
• Router setup, installation and management.
• IP setup, planning and management.
• Firewall setup, planning and management.
• Maintanence of core functionality of VAS products and systems.
• Reporting monthly/weekly on network backhaul capacity.
• Tier 3 Engineer directly supports VIP and offnet clients.
• Assist RF & access network with site planning and development.
• Any adhoc duty as per the operational requirement of the business.
• Operate standard working hours with potential adhoc afterhours availability as per operational requirements.

The successful candidate must have the following experience/skills:

• 3 Years network experience.
• Working knowledge in BGP, OSPF, MPLS, Routing, Switching and Mikrotik Hardware.
• Experience with TCP/IP, DNS, DHCP, routers, IP routing, and switches.
• Ability to work independently and under pressure.
• Good customer service skills.
• Good communication and reporting skills.
• Good problem solving & analytic skills.
• Good time management skills.
• Good admin skills.
• Ability to function in a team.
• Juniper knowledge is advantageous.

Education Requirements:

• Minimum MTCNA Certification.
• MTCRE Certification recommended.
• N+ is advantageous.
• A+ is advantageous.
• Other diplomas in the relevant field is advantageous.

PLEASE NOTE:

• Preference will be given to Previously Disadvantaged Individual candidates in line with Herotel's Employment Equity Plan.
• Submission of your CV provides Herotel with your express consent for us to process your personal information contained therein, for purposes of processing your application. Please refer to our Privacy Policy on our website for further information on how we process personal information.
• Kindly note that should you not receive feedback from us within 4 weeks of applying, you should consider yourself unsuccessful for the role.

Plattekloof, ZA

Full-Time

Networks

Job Openings

Network Engineer - Tier 4

Applications are invited for the Network Engineer - Tier 4 position to be based in Plattekloof.

PURPOSE OF THE ROLE:

As a Network Engineer – Tier 4, you will work with both hardware and software to ensure the smooth operation of network systems. This includes installing and maintaining network components such as routers, switches, and data centre equipment. You will monitor and optimize core network performance and troubleshoot any issues that arise.

Key Performance Areas would include, but are not limited to:

• Manage the RFC deployment and compliance.
• Manage capacity planning.
• Implement and administrate any required change management
• OSPF planning, management and optimization.
• MPLS/VLANs planning, configuration and management.
• Planning and advanced, maintenance and support of:
• Router configurations and L2 Switching.
• Network device management.
• Advanced IP planning, deployment and management.
• Advanced Firewall planning, deployment and management.
• Logical design, drawing and documentation of networks (as per RFC).
• Responsible for monitoring and troubleshooting the network.
• Enforcement of SOP.
• Escalate all advanced RF or Fibre problems to relevant departments.
• Reports into the NOC Team Leader and assists with management, planning, implementation and maintenance.
• Manage projects effectively.
• Advanced fault finding.
• Compile reports as required.
• Any adhoc task as per the operational requirement of the business.

The successful candidate must have the following experience/skills:

• 5 years Network Engineer experience.
• OSPF Routing Expert.
• MPLS Intermediate/Expert.
• Mikrotik Routers Expert.
• L2 Switching Expert.
• Ability to communicate complex ideas both written and verbally.
• Must be able to compose and manage complex network.
• Networking Expert / Expert +.
• Proven experience on: UBNT & Cambium.
• BGP experience.
• Ability to work independently and in a team.
• Ability to work quickly, effectively and under pressure.
• Advanced Problem-solving skills.
• Time management skills.
• Good Communication skills (written and verbal).
• Build and maintain strong team and interdepartmental relationships.

Education Requirements:

• MTCNA Certification.
• MTCRE Certification.
• A relevant tertiary qualification would be advantageous.
• Juniper experience is advantageous

PLEASE NOTE:

• Preference will be given to Previously Disadvantaged Individual candidates in line with Herotel's Employment Equity Plan.
• Submission of your CV provides Herotel with your express consent for us to process your personal information contained therein, for purposes of processing your application. Please refer to our Privacy Policy on our website for further information on how we process personal information.
• Kindly note that should you not receive feedback from us within 4 weeks of applying, you should consider yourself unsuccessful for the role.

Network Engineer

Century City, Cape Town – Onsite

R720,000 – R960,000 CTC per annum

5+ years' experience

About the role

We're hiring a Network Engineer to design and manage advanced networking solutions that support large-scale, autonomous applications. The role involves building networks in complex environments, supporting projects across multiple regions, and working with both wired and wireless technologies.

Key responsibilities

• Design and implement enterprise networks, including wired (Cisco/UBNT) and private wireless/5G/LTE.
• Configure and support user equipment and networking hardware.
• Provide 2nd and 3rd line support, ensuring systems meet SLA standards.
• Develop processes, documentation, and automated reports on network performance.
• Collaborate with RF Engineers to optimise coverage.
• Attend customer and partner meetings, including occasional travel.

Requirements

• 5+ years' experience in network engineering.
• Relevant degree or certification.
• Hands-on experience with wired, wireless, and 5G/LTE networking.
• Strong troubleshooting and communication skills.
• Ability to work across global teams and provide high-level support.

What's on offer

• R720k – R960k annual CTC
• Medical aid contribution
• In-office role, Century City
• Occasional travel, including international exposure

Job Types: Full-time, Permanent

Pay: R720 000,00 - R960 000,00 per year

Ability to commute/relocate:

• Century City, Western Cape: Reliably commute or planning to relocate before starting work (Required)

Experience:

• Network Engineering: 5 years (Required)
• Cisco: 5 years (Required)
• UBNT: 5 years (Required)
• 5G/LTE networking: 5 years (Required)

Willingness to travel:

• 25% (Required)

Work Location: In person