Senior Networks Engineer - Data
11 hours ago
London
Jointly owned by EDF Customers and Dalkia, we are a leading technical services group operating nationwide in the UK. Housing key expertise under one roof, we provide specialist technical services in technical facilities management, mechanical and electrical engineering, energy performance contracting and systems integration and digital services. We leverage the strength of our Group, without losing the personability of a smaller business. In fact, our customers tell us that we build the best people and customer relationships in the business. 5,000 employees and a diverse and inclusive ethos, we are proud to attract great talent, nurturing and inducting our people who embed the Dalkia DNA and apply an innovative mindset across all customer engagements. With 106 employees, the Dalkia group centre has HR, Payroll, Finance, Legal, IT, QSHE and Communications teams supporting our business unit colleagues in these specialisms. We provide technical expertise, governance, policy, guidance and support to the business units to provide a high-quality service to their own people and their clients. As our Senior Network Engineer, you will be responsible for designing, implementing, and securing complex network infrastructures across multiple sites and cloud environments. This role requires deep expertise in Fortinet, Cisco & other network technologies, with a strong focus on network security, SD-WAN, and cloud networking. A key part of the role involves team leadership, security posturing, and ensuring the resilience and compliance of all network services. As our Senior Network Engineer, you will: Design, deploy, and maintain LAN/WAN infrastructure across corporate offices, data centres and all Dalkia sites. Configure, manage, and troubleshoot network security appliances and firewalls, particularly Fortinet FortiGate. Support and enhance SD-WAN solutions, ensuring high availability and performance across remote sites. Administer and troubleshoot complex BGP configurations and other routing protocols (OSPF, EIGRP). Oversee daily network operations tasks, including monitoring, patching, backups, performance tuning, and documentation. Ensure security best practices are applied across all network layers, participating in audits and remediation projects. Participate in the planning and execution of network upgrades, migrations, and disaster recovery procedures. Maintain detailed network documentation, including diagrams, IP schemas, and configuration standards. Analytical able to analyse data, draw out themes/trends to inform data-driven decisions. Commercial Awareness understands the importance of managing costs and expenses, applying the necessary controls. Risk Management is aware of the impact on risk to the business and applies the necessary controls. Fortinet software and security services Deep knowledge of network security principles, firewall rules, VPNs, VLANs, and NAC. Advanced configuration and management of FortiGate firewalls, FortiManager, FortiAnalyzer, and FortiSwitch. Deep understanding of Fortinet Security Fabric, including integration across endpoints, networks, and cloud. Proficient in Fortinet security policies, UTM features, and threat intelligence. Experience with data centre networking and high-availability designs. Comfortable leading incident response and conducting root cause analysis. Solid understanding of network monitoring tools (e.g., Experience with ITIL processes and change management practices is a plus. Good knowledge of Service Desk Management Systems Have the ability to multitask and prioritise workload, while maintaining efficiency and quality of work. Our clients have to know they can rely on us, and we should continuously work on building great relationships with them Being responsible employees, customers and people is also very important, we have the opportunity to make a positive difference for our immediate, and the wider, environment through our action Equity, Diversity and Inclusion: At Dalkia, we are committed to equity, diversity, and inclusion. Our talent acquisition team is here to assist you. Flexible working ~ A competitive salary package ~ We pay for professional memberships relevant to your role and invest in our peoples professional development ~ Pension Scheme ~ Private Healthcare ~ Life assurance ~25 Days Holiday PLUS Bank holidays ~ Cycle to work scheme ~ Salary sacrifices electric vehicle scheme where we help you lease an electric vehicle for a fixed monthly cost ~ Access to our Benefits platform with a wide range of retail discounts.