Senior Network Administrator

**Area**: Menlyn Maine, Pretoria (Office based)

**Qualifications**:

- Matric or equivalent qualification recognised by the Department of Higher Education & Training.
- A national diploma or degree in relevant field will be an advantage.
- Any network qualification (i.e., CCNA, CCNP, Arista ACE, Fortinet) would be an advantage.

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**Role**:

- Manages the core network infrastructure environment, including Cisco firewall and switch day to day administration.
- Manages the installation, securing, repair/troubleshooting and maintenance of LAN and WAN environments, overseeing the implementation of data and network security.
- Maintains the business-as-usual activities around the LAN and WAN environments.
- Adheres to organisations policies, procedures, and documentation requirements (i.e., Change Control, etc.).

**Skills and Experience**:

- Minimum of 5 years working experience in a Senior Network Administration role.
- Strong knowledge and experience of Cisco firewall, router, and switch technologies:

- Cisco Internetworking Operating Systems: IOS / IOS XR / NX OS
- Cisco routers: 800 / 1700/ 1800 / 2600 / 2800 / 3600 / 3800 /7200 series
- Cisco switches: C2950 / C2960 / C3560 / C3750 / ME3400 / C6500 /
- Strong knowledge and experience of Fortinet firewall technologies.
- Strong knowledge and experience of Arista switch technologies.
- Strong knowledge of Windows operating system: o Knowledge of Windows interoperability with LAN
- Microsoft Windows Servers 2000 / 2003 / 2008 / 2012
- Microsoft Office 2003 / 2007 / 2010 / 2013 / 2016
- TCP/IP, DNS, DHCP, Subnetting, IPv4, IPv6, VPNv4
- Knowledge of Security, Patch maintenance process on LAN environments: o VLANs, switch access, IDS, IPS
- Network monitoring NETFLOW, SNMP, IPSLA.
- Excellent understanding of Service Provider and Enterprise Architecture:

- Experience implementing QoS, VPN, MPLS, SD-WAN.
- Configuration of OSPF, ISIS, BGP, MPLS, TE protocols
- Routing protocols RIP, OSPF, EIGRP, BGP, IS-IS, MP-BGP, MPLS, TE protocols.
- LAN Technologies VLANS, STP, VTP, Port Security, PBR (Policy Based Routing)
- VPN: GRE / IPSec / DMVPN / MPLS / VRFs/ LDP/RSVP-TE/ L2 VPNs
- Experience implementing QoS, VPN, MPLS, SD-WAN.
- Configuration of OSPF, ISIS, BGP, MPLS, TE protocols
- Routing protocols RIP, OSPF, EIGRP, BGP, IS-IS, MP-BGP, MPLS, TE protocols.
- LAN Technologies VLANS, STP, VTP, Port Security, PBR (Policy Based Routing)
- VPN: GRE / IPSec / DMVPN / MPLS / VRFs/ LDP/RSVP-TE/ L2 VPNs

**What the job will entail day to day**:

- Establishes network specifications by conferring with users, analysing workflow, access, information, and security requirements.
- Day to day administration of Cisco, Fortinet firewalls, switches, and routers, including interface configuration and routing protocols.
- Evaluating network performance issues including availability, utilization, throughput, and latency.
- Planning and executing the selection, installation, configuration, and testing of equipment; defining network policies and procedures.
- Establishing connections and updating firewall access list.
- Maintains network performance by performing network monitoring and analysis, and performance tuning; troubleshooting network problems; escalating problems to vendor.
- Upgrades network by conferring with vendors; developing, testing, evaluating, and installing enhancements.
- Maintains organisation data flow and network diagrams.
- Assists with and oversees the management of user access and maintaining related records.
- Secures network by developing network access, monitoring, control, and evaluation, maintaining documentation.
- Assists with and oversees the Data Centre operations and environment.
- Providing technical support to employees and 3dr Partys.
- Assists in overseeing the organisation and operation of the Network Operations Centre (e.g., monitoring temperature organising materials, ensuring availability of materials, etc.) for the purpose of ensuring efficient operations.
- Manages project migrations for hardware/software systems for the purpose of ensuring efficient operations.
- Research trends, products, equipment, tests, etc. for the purpose of recommending procedures and/or purchases.

**Special Requirements**:

- Willing to work overtime - as an exception when required.
- Perform standby duties - as an exception when required.
- Travel nationally.
- Must be self-learning.
- Able to work independently.
- Must have own reliable transport.