Senior Network Engineer

Redhill Surrey Based -Fixed Term Contract 12 months

About Indra Group UK & Ireland

Indra is a leading global technology and consulting company, and a trusted technological partner for the core business operations of its clients worldwide. It stands at the forefront of key sectors including Transport, Defence, Air Traffic Management and Space, alongside advanced Information Technology services delivered through Minsait, and cutting-edge capabilities in Sovereign AI, Cybersecurity, and Cyberdefence via IndraMind.

The company’s business model is built around a comprehensive portfolio of proprietary products, combining strong innovation with a high-value focus for customers.

With more than 2,500 projects implemented across 50 countries and over 100 cities, Indra is a global benchmark in innovative transportation and mobility solutions. It is recognised as one of the world’s top three companies in public transportation management systems. Indra’s technology supports the daily journeys of over 78 million people, helping to reduce more than 10 million tonnes of CO₂ emissions annually, and helping save nearly 3,000 lives through improved traffic management and road safety.

Indra Group is paving the way to a more secure and better-connected future through innovative solutions, trusted relationships and the very best talent. Sustainability sits at the heart of its strategy and culture, driving efforts to address current and future social and environmental challenges.

In the 2024 financial year, Indra achieved revenues of €5.5 billion, over 60,000 professionals, maintained a local presence in 46 countries, and operated across more than 140 countries worldwide.

As the technological partner for its customers’ key operations, Indra is at the core of their business, and Indra’s four values guide everything we do:

Innovation - Our capacity for innovation, cutting-edge solutions, and specialised team of professionals enables us to drive a safer, more connected future through technology.

Trust - We work with strength, commitment, and reliability, delivering quality solutions to build trust with customers, employees, partners, investors, and society.

Connection - We harness the power of collaboration, connect ideas and solutions, and adapt to our customers’ needs, supporting them on the path to a better future.

Foresight - We anticipate future needs to make the world safer and more connected, transforming our experience and knowledge into solutions for a better tomorrow.

About the Project

Transport for London (TfL) has awarded Indra a long-term contract to operate, develop, enhance and expand ticketing and access control systems across London’s transport network through to 2034, with extension options to 2039.

This programme covers the maintenance, operation and evolution of a large-scale, complex ecosystem, including turnstiles, validators, ticket machines, sales terminals, back-office systems, payment gateways, IT infrastructure and cybersecurity that supports over 8.6 million daily journeys.

Therefore, Indra will become TfL’s strategic technology partner to guarantee the operation and evolution of the world’s largest and most sophisticated ticketing system. Following a transition period of approximately two years, Indra will serve as the sole provider across the network that includes more than 8,500 buses, nearly 400 Underground stations, around 300 rail stations (Overground, DLR, Elizabeth Line and suburban services), 4,000 Oyster Card outlets, seven customer service centres, and 24 river boat boarding points.

Drawing on over 30 years of experience in urban public transport solutions, Indra will manage and evolve all aspects of the system. The project also envisages, in partnership with TfL, the implementation of new technologies to develop the system, make it more efficient and automate key processes; in short, to jointly create the next generation of the ticketing system for London.

Summary

We are seeking a Senior Network Engineer to support the transition, implementation and future operation of enterprise network services, ensuring that network infrastructure is secure, resilient, well documented and capable of supporting business-critical operations.

Although the long-term approach is to provide stable, ongoing network services and support transformation projects, the immediate focus of the role will be on service transition and project implementation activities, including technical delivery, operational readiness, network documentation, change support and handover into BAU service operations.

The successful candidate will provide strong technical expertise across LAN, WAN, data centre, wireless, mobile and security technologies, working closely with customer stakeholders, internal engineering teams, service management functions, third-party suppliers and project teams to deliver reliable technical solutions for both transition activities and ongoing transformation initiatives.

The position requires a proactive engineer with excellent troubleshooting skills, strong ownership of technical deliverables and the ability to operate effectively in complex, multi-site and mission-critical environments during transition, transformation and steady-state service phases.

Key responsibilities

· Service transition and implementation: Support incoming service transition and project implementation activities, including technical delivery, operational readiness, testing, documentation and handover into BAU operations.

· Network operations and support: Support stable ongoing network services by managing network-related incidents, service requests and escalations in line with agreed service levels.

· Transformation projects: Contribute to network transformation initiatives by providing technical input, implementation support, migration assistance and specialist engineering expertise.

· Technical implementation: Install, configure, commission and support network infrastructure platforms including routers, switches, firewalls, load balancers and associated connectivity services.

· Network design and engineering: Provide input into network design, technical options, equipment recommendations and deployment approaches for enterprise and customer engineering projects.

· Monitoring and network health: Monitor network performance and availability using management tools, perform regular health checks, identify risks or degradation and support corrective actions.

· Routing, switching and secure connectivity: Administer and troubleshoot network protocols and technologies including MPLS, BGP, OSPF, IPsec, VLANs, spanning tree, QoS, remote access and secure routing solutions.

· Change management: Support network change planning, implementation, communications and procedural compliance within the agreed change control framework.

· Documentation and knowledge transfer: Create and maintain accurate, clear and comprehensive network documentation, operational procedures and knowledge articles to support transition, transformation and BAU operations.

· Security, resilience and performance: Support network availability, performance, scalability and security through traffic management, WAN optimisation, caching, firewalling, encryption and quality-of-service techniques.

Requirements

Essential skills, knowledge and experience

• Extensive experience designing, installing, commissioning and supporting complex multi-site LAN and WAN networks, predominantly using Cisco technologies.
• Strong knowledge of routing and switching, IP addressing and dynamic routing protocols including BGP and OSPF.
• Hands-on experience with MPLS, IPsec, QoS, VPN and firewall technologies.
• Strong network troubleshooting and problem-solving skills within enterprise, data centre or customer-facing environments.
• Experience with Cisco routers, switches and Nexus platforms.
• Experience supporting network security technologies, including firewalls, access control and encryption.
• Experience using network monitoring and diagnostic tools such as SolarWinds, NetFlow or packet analysers.
• Ability to produce and maintain network documentation, diagrams and technical procedures.
• Experience working with incident, service request and change management processes.

Desirable

• CCNP Enterprise or equivalent certification.
• Experience with F5 load balancers.
• Experience with Juniper or other firewall technologies.
• Experience with DHCP, DNS, RADIUS/TACACS+ and related network services.
• Experience in transport, public sector, regulated or mission-critical environments.

Benefits

• Holidays: 25 days per annum + 8 days bank holidays (options to buy/sell days).
• Pension - 4% employee and 4% employer.
• Private medical insurance (including dental & optical).
• Life assurance.
• Income protection.
• Employee assistance programs.
• Flexible/remote working options.
• Charitable initiatives.
• Social events (formal & informal).
• Learning and development programs.
• Innovative & collaborative work environment.

Indra is an equal employment opportunity employer. Applicants are considered without regard to race, colour, religion, sex, sexual orientation, gender identity, origin, disability or other characteristics protected by law.