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CenturyLink

Global telecommunications and IT services provider

Senior IT Engineer

Network Engineering & AdministrationUpdated on Nov 14
Full-timeRemote in SingaporeNo salary listedRemote

About the Job

Requirements

  • A minimum of 7 years of experience in the financial industry is required; trading-environment experience is preferred.
  • Experience architecting, designing, implementing, and maintaining trading-related network infrastructure, including market data distribution networks and low-latency, ultra-low-latency, and high-frequency trading networks.
  • Knowledge and experience with network security systems in financial trading environments, including architecture, engineering, implementation, and operations.
  • Experience architecting, designing, implementing, and troubleshooting networks for different needs in the financial industry.
  • A solid background designing, managing, and troubleshooting diverse multiprotocol switched and routed enterprise networks.
  • Expert knowledge of firewall technology, including architecture, design, implementation, operations, and troubleshooting.
  • Ability to configure firewall rules and policies for client connectivity and other network security requirements.
  • Ability to analyze firewall logs and policies to troubleshoot client connections and network security issues.
  • Ability to troubleshoot network connectivity issues with external and internal clients.
  • Ability to handle complex network engineering assignments with little supervision.
  • Ability to analyze and resolve network issues identified by monitoring tools and systems.
  • Ability to document work and use Microsoft Visio to create or work with network diagrams.
  • Expert knowledge and experience with BGP and other routing protocols to design and implement connectivity solutions for clients and vendors and manage the trading network environment.
  • Ability to use packet-tracing technologies to troubleshoot network issues.
  • Knowledge of TCP, UDP, and higher-layer protocols to understand application performance and troubleshoot application issues on the network.
  • Ability to create and maintain network-device configurations and relevant databases.
  • Extensive knowledge of routing protocols and technologies, including BGP, OSPF, EIGRP, static routing, route redistribution, summarization, and policy routing.
  • Knowledge of firewall architecture, design, configuration, operations, and troubleshooting.
  • Knowledge of switching technologies, including trunking, spanning tree, dot1q, VLANs, VTP, Ethernet switching, multilayer switching, vPC, and MLAG.
  • Knowledge of multicast technologies, including PIM, IGMP, and MSDP.
  • Knowledge of network services and protocols, including TCP/IP, UDP, HSRP, DNS, DHCP, FTP, TFTP, NAT, TACACS, SSH, NTP, syslog, and Telnet.
  • Knowledge of network management and automation technologies, including SNMP, syslog, IPSLA, NetFlow, network telemetry, and network automation tools.
  • Knowledge of security technologies, including IPsec, VPNs, firewalls, firewall management and analyzer systems, and IDS systems.
  • Experience or knowledge of packet-analysis tools and methods, including PICO CNEs, Wireshark, sniffers, packet captures, and packet decodes, including market-data and FIX packet decodes.
  • A minimum of a bachelor's degree is required.
  • Candidates should provide job-related accomplishments from current or previous roles.

Responsibilities

  • Architect, design, implement, and troubleshoot networks for financial-industry needs.
  • Configure firewall rules and policies for client connectivity and other network security requirements.
  • Analyze firewall logs and policies to troubleshoot client connections and network security issues.
  • Troubleshoot network connectivity issues with external and internal clients.
  • Jointly perform weekly pre- and post-implementation reviews of security operational activities with the Security Architecture Manager.
  • Review active firewall policies and proposed changes for insecure rule sets and coordinate with customers to ensure rules support intended objectives.
  • Work with the Security Architecture Manager and Network Manager to track assigned projects and tasks and ensure SLA compliance.
  • Analyze and resolve network issues identified by monitoring tools and systems.
  • Respond to trouble tickets and perform scheduled network-security activities.
  • Design and implement connectivity solutions for clients and vendors, and manage the trading network environment.
  • Create and maintain network-device configurations and relevant databases.

Desired Qualifications

  • Trading-environment experience.
  • Cisco, Arista, Juniper, or Fortinet certifications in network security.

About the Company

CenturyLink

Global telecommunications and IT services provider

CenturyLink, now Lumen Technologies, provides telecommunications and IT services for businesses and government, including voice, network, cloud, and managed services. Its offerings cover VoIP, SIP Trunking, hosted VoIP, SD-WAN, MPLS, IPVPN, plus Big Data as a Service, IoT, and cloud management across hybrid, private, and public clouds—backed by data centers. Compared with competitors, it combines traditional communications with modern network and cloud services at scale, serving a wide range of industries globally. Its goal is to help customers communicate, connect, and digitally transform with secure, reliable, and scalable network and cloud solutions.

Company size
10,001+
Company stage
IPO
Headquarters
Monroe, LA
Founded
1930

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