IT Systems Administrator

Citco GSGS; London; On-site; GBP 40,000 - 60,000; Full time

Job summary

A leading company is seeking a Network Operations Engineer to support and maintain their global network infrastructure. The role involves troubleshooting, monitoring, and providing support for both WAN and LAN environments. Candidates should have strong knowledge of networking protocols and Cisco technologies, with flexibility for on-call support and potential travel.

Qualifications

• Strong knowledge of TCP/IP, OSPF, BGP, and Cisco technologies.
• Experience with VPNs, firewalls, and network redundancy.

Responsibilities

• Provide level 1 and 2 support for global network infrastructure.
• Maintain and monitor WAN and LAN at datacenters and remote offices.
• Participate in on-call support rotation and troubleshoot network issues.

Skills

TCP/IP protocols

OSPF multi-area

BGP v4

Cisco routers

Cisco Switching

IPsec VPNs

Firewalling

LAN switching

Wide area network circuits

Network hardware redundancy

Job description

About the Team & Business Line:

The Network operations engineers report to the Network Manager, and fulfill mainly a day-to-day operations and support role. They maintain close interaction with many other global and local IT operations groups, application support teams, and development staff worldwide. They also work routinely with telecommunications carriers, network gear manufacturers and other providers. This position focuses on network infrastructure support, day to day operations, but also implements small projects such as hardware refreshes and build out of the network for new offices.

Qualifications

About You:

Strong knowledge and experience in the following areas and technologies:

• TCP/IP protocols (TCP, UDP, FTP, GRE, IPsec, etc.)
• OSPF multi-area.
• BGP v4 (iBGP and eBGP).
• Cisco routers, branch office to datacenter grade
• Cisco Switching (Nexus, Catalyst and Meraki)
• IPsec site-to-site VPNs, and remote access VPNs using Ivanti and Palo Alto Global Protect.
• Firewalling, access lists, protocol inspection.
• LAN switching, Spanning Tree protocol, VLANs, dot1Q trunking, LACP port-channels, vPC, VSS.
• QOS on the LAN and WAN.
• Wide area network circuits and services (MetroE, MPLS, etc.)
• Clear understanding and proven experience on implementing network hardware redundancy.

Responsibilities

Your Role:

• Worldwide level 1 and level 2 support for the network infrastructure
• Responsible for the maintenance, monitoring and ongoing support of the global Citco network, including WAN and LAN at the datacenters, remote offices worldwide, and external clients.
• Manage chronic problems to closure
• Show good common sense and decision making criteria
• Troubleshooting within the network scope and outside into other technology areas in assistance of other IT groups
• General network maintenance: software upgrades/patching of network devices (firewalls, routers, switches, SDWAN, etc)
• Abide by established processes, procedures and policies
• Participate in the on-call support rotation
• Flexibility with working shift
• Travel potentially up to several times per year