Senior Network Engineer

About CLS:  

CLS is the trusted party at the centre of the global FX ecosystem. Utilized by thousands of counterparties, CLS makes FX safer, smoother and more cost effective. Trillions of dollars’ worth of currency flows through our systems each day.  

Created by the market for the market, our unrivalled global settlement infrastructure reduces systemic risk and provides standardization for participants in many of the world’s most actively traded currencies. We deliver huge efficiencies and savings for our clients: in fact, our approach to multilateral netting shrinks funding requirements by over 96% on average, so clients can put their capital and resources to better use. 

CLS products are designed to enable clients to manage risk most effectively across the full FX lifecycle – whether through more efficient processing tools or market intelligence derived from the largest single source of FX executed data available to the market. 

Our ambition to make a positive difference starts with our people. Our values – Protect, Improve, Grow – underpin everything that we do at CLS and define and shape a supportive and inclusive working environment in which everyone is encouraged to be open and forward-thinking. 

Job purpose  

The role is primarily responsible for the engineering and re-engineering of the CLS network estate, providing subject matter expertise in network security, cloud networking and routing & switching. 

Essential Job Functions 

• Responsible for ensuring that the network is secure and built to best practices, in line with industry standards, such as CIS controls. 
• Must have a strong focus on cloud networking and cloud network security with experience demonstrated in extending on-premises networks to the cloud. 
• Strong understanding of first and next generation firewalling with experience using multiple contexts and multiple tiers within a complex environment. 
• Good working knowledge of Intrusion Prevention System (IPS) policies and deployment. 
• Good working knowledge of Network Admission Control (NAC) and other network security appliances, such as RSA. 
• Experience in using management center tooling for firewall rule deployment. 
• Thorough understanding and experience of deploying both spine and leaf switching fabrics and traditional switching methodologies. 
• Knowledgeable in understanding routing methodologies and route manipulation with good understanding of BGP and OSPF along with policy-based routing and prefixes lists.   
• Understanding of deploying and troubleshooting WiFi networks. 
• Demonstrable knowledge of troubleshooting complex network issues including packet tracing, using CLI and Wireshark. 
• Demonstration of strong technical documentation skills such as authoring Low Level Designs, producing Technical Specifications (Tech Specs) and authoring project deployment documentation, such as technical implementation plans, back out plans and test plans. 
• Competent in producing network schematics using MS Visio and Draw.io. 

Minimum Job-related Experience Required  

• Keeping current with the latest technologies by conducting research and undertaking vendor and product reviews. 
• Work with decision-makers to define business and systems requirements and recommend new technology in accordance with corporate policies. 
• Provide last line support for solutions delivered by the engineering function in line with existing IT service management processes.  Act as an escalation point, for the managed service, for problems pertaining to network technology and with a view to re-engineering.  This will include a small element of on call, with the Rota currently operating at 1 week in 6. 
• A minimum of five years working as a senior engineer across all technologies described above. 

• Good understanding of working in a regulated environment and conversant with the adoption of good Governance, Risk and Compliance (GRC) practices. 
• Preferable for experience gained working in a regulated financial services / banking organisation. 

Specialist Skills/Knowledge 

• In-depth knowledge of design, implementation, troubleshooting, configuration and testing of the following: 

• Routing – OSPF, BGP, knowledge of route redistribution and manipulation. 
• WAN - MPLS, VRF, PfR, Internet and DIA, VPN, SDWAN, understanding of circuit provisioning. 
• Datacenter – Spine and Leaf, using a Clos fabric, VxLAN and distribution switching. 
• Encryption - IPsec VPN, MACSec and configuring site-to-site VPN on routers and firewalls. 
• Switching and L3 - HSRP, VRRP, GBLP, NTP, STP, RSTP, QoS, CoS, SVI, VLAN’s, ACL’s. 
• WiFi – Cloud based Wireless LAN solutions and centralised Wireless LAN controllers with distributed Lightweight APs. 
• Firewalls – Familiar with multiple products from multiple vendors together with rule deployment via the management tooling and CLI. 
• Cloud – Implementing connectivity to the cloud with Direct Connect, BGP, VPC, Transit Gateways, DX Gateways, NAT Gateways, Security Groups and AWS Firewall is required. 
• Troubleshooting – provide effective troubleshooting methodologies using packet captures on firewalls, using the CLI, and Wireshark. 

Minimum Education Required  

• Bachelor’s degree educated or equivalent. 
• Industry standard IT certification desired e.g., AWS / Cisco / Checkpoint / Fortinet.  

Our commitment to employees: 

At CLS, we celebrate diversity and consider this to be one of our strongest assets. We are committed to fostering an environment in which everyone feels comfortable to be who they are, and inclusion is valued. All employees have access to our inclusive benefits, including: 

• Holiday - UK/Asia: 25 holiday days and 3 ‘life days’ (in addition to bank holidays). US: 23 holiday days. 
• 2 paid volunteer days so that you can actively support causes within your community that are important to you. 

• Generous parental leave policies to ensure you can enjoy valuable time with your family. 
• Parental transition coaching programmes and support services. 
• Wellbeing and mental health support resources to ensure you are looking after yourself, and able to support others. 
• Affinity Groups (including our Women’s Forum, Black Employee Network and Pride Network) in support of our organisational commitment to embrace and always be learning more about DE&I. 
• Hybrid working to promote a healthy work/life balance, enabling employees to work collaboratively in the office when needed and work from home when they don’t. 
• Active support of flexible working for all employees where possible. 
• Monthly ‘Heads Down Days’ with no meetings across the whole company. 
• Generous non-contributory pension provision for UK/Asia employees, and 401K match from CLS for US employees. 
• Private medical insurance and dental coverage. 
• Social events that give you opportunities to meet new people and broaden your network across the organisation. 
• Annual flu vaccinations. 
• Discounts and savings and cashback across a wide range of categories including health and retail for UK employees. 
• Discounted Gym membership – Complete Body Gym Discount/Sweat equity program for US employees. 
• All employees have access to Discover – our comprehensive learning platform with 1000+ courses from LinkedIn Learning. 
• Access to frequent development sessions on a number of topics to help you be successful and develop your career at CLS.