Snr Core Network Engineer


Experience5 - 10 years

Fill 66Johannesburg (Gauteng)

Last shared 246 days ago

Job Description

Job Skills Required:

  1. Cisco Qualifications Minimum:
    • CCNP-SP (or equivalent)
    • Up to CCIE written exams
    • CCIE – LAB adv
  2. 3-5 years working experience with Switches & Routers running IOS, IOS XR, IOS XE, NX-OS (Cisco) , RouterOS (Mikrotik) , EOS (Arista) & OpenWrt(ViBE) in ISP/Telecoms Core Networks.
  3. Relevant tertiary qualification.

4.In-depth knowledge of TCP/IP & MPLS (VPN, RSVP, LDP, TE).

5.Experience with Security Engineering on Core ISP level. (Fortigate)

  1. Advantage: VoIP and SIP Knowledge. VoIP hardware Knowledge
  2. High level Network Design.  (Failover Strategies, QoS, Firewalling etc)
  3. Advantage: Asterisk experience.
  4. VoIP codecs.
  5. Understand General Protocols (UDP, ICMP, SIP, RTP, TCP etc)
  6. Experience with routing protocols. (BGP, OSPF, IS-IS). 3-5 years in ISP core networks.
  7. Advantage: Vibe knowledge would be an advantage.
  8. Working experience with Switching Technologies (VLANs, STP, RSTP, RSPAN, Ether-channel, HSRP/VRRP, Q-in-Q)
  9. Linux experience.


  • Design and deploy High Availability ISP network.
  • Bridge the gap between all the networking Layers.  (Layer1 up to Layer7 services)
  • Advanced debug of customer or equipment problems
  • Advanced Protocol debugging (Routing and application protocols)
  • Equipment set up and solution advice
  • Network equipment setup (Mikrotik/Cisco)
  • Lab testing of CPE equipment required to connect on site
  • Testing of last mile solutions – and high-level fault finding – IP SLA
  • Monitor of complete network-  Observium / IRIS
  • Monitor and graph traffic on all interfaces. 
  • Routing and IP management - Racktables
  • VLAN management
  • POE switch management
  • Monitor QoS to customers
  • VPN setup and support
  • Manage/change Vendor routes
  • Test vendor routes
  • Identify and resolve vendor problems
  • Up skilling 1st line support, 2nd line support, core engineers and technicians by way of documentation and training.

About iConnect

iConnect SA (Pty) Ltd started in 2004, focusing on innovation and skills development in the information and communication technology sectors, with specific emphasis on the corporate and SME markets.

We are an ISP that provides mostly fibres to business with VoIP services attached. We value relationships with our clients and undertake a collaborative approach to develop blueprints to help future-proof businesses in a rapidly advancing IT environment.

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