Sr IT Engineer (HOME, SG)
Lumen is the trusted network for the AI‑powered world, connecting people, data, and applications through our expansive fiber network and connected ecosystem. We enable secure, high‑performance connectivity across cloud, edge, and AI workloads for enterprises, governments, and communities.
At Lumen, you’ll work on infrastructure customers rely on today and build for what’s next, where performance, security, and resilience matter.
This is a high accountability environment where bold ideas drive real innovation for our customers, partners, and industry. The work is challenging, expectations are clear, and trust is built into how we operate. If you’re ready to take ownership, deliver meaningful impact, and help shape the future of AI‑ready connectivity, join us today.
Experience
A minimum of 7 years in the Financial Industry, preferably in a Trading environment, is required for this position. The candidate must have experience in the Architecture, Design, Implementation, and Maintenance of Trading-related Network infrastructure, such as: Market Data Distribution Networks, low-latency, ultra-low-latency and high frequency trading networks.
The candidate must have the relevant knowledge and experience with Network Security systems in a financial trading environment, including the Architecture, Engineering, implementation and operations of the different aspects of Network Security in a financial trading environment.
General Competency:
- Must be highly motivated
- Willing to work in a fast-paced, constantly changing environment
- Must have a good communication skill
- Must be customer focused
- Ability to work effectively and productively with others, and still comfortable working independently
What We Look For in a Candidate
Core Technical Competency:
- Architect, Design, Implement, and Troubleshoot Networks for different needs in the financial industry.
- A solid background designing, managing, and troubleshooting diverse multi-protocol, switched and routed enterprise networks.
- Expert level knowledge of Firewall technology – including Architecture, design, implementation, operations, and troubleshooting.
- The candidate must be very comfortable configuring firewall rules and policies for both client connectivity and other security requirements of the network.
- Ability to analyze firewall logs and policies to troubleshoot client connections, and other network related security issues on the network.
- Ability to be able to troubleshoot network connectivity issues with both external and internal clients.
- The candidate would Jointly work with the Security Architecture Manager to perform weekly pre and post implementation review of security operational activities.
- Review active firewall policies and proposed changes for insecure rule sets and coordinate with the customer to ensure rules will support intended objectives
- Work with the Security Architecture Manager and the Network Manager to track the progress of assigned projects and tasks to ensure SLA compliance.
- Ability to handle complex network engineering assignments with little supervision.
- Analyze and resolve network issues or as determined by monitoring tools and systems.
- Respond to Trouble Tickets and perform scheduled activities related to network security.
- The candidate must be good at documentation in general. Competent with working with network diagrams using Microsoft Visio.
- Expert level knowledge and experience with BGP and other routing protocols to be able to design and implement various connectivity solutions to clients, vendors, and the management of the Trading network environment.
- Strong ability to use packet tracing technologies to troubleshoot network issues.
- Strong knowledge of TCP, UDP, and higher layer protocols in order to understand application performance and troubleshooting application issues on the network.
- Create and maintain network device configurations and relevant databases.
Specific Techno