Senior Network Engineer

Title: Senior Network Engineer

Location: Hybrid – Work from home and office visits as and when required (London Campus)

Target Start Date: End of July 2025

Contract duration: 6 months (potential to extend)

Deloitte

Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.

Senior Network and Firewall Engineer (T1) – Network Services

Everyone knows technology is the fastest changing industry in the world. We’re shaping our IT landscape by transforming how we deliver our IT change projects, and we need you to join us. You’ll build collaborative relationships in a team that brings together extremely talented individuals who have enjoyed long careers at Deloitte and many new people like you. Join them at this exciting time and you will be enjoying the kind of professional development where you can explore your potential.

Team Summary

This is a Network Infrastructure support role within the IT Operations function at Deloitte. Reporting to the Network & Security Operations Manager and working closely with other internal ITS teams, the Network support engineer will provide internal technical consultancy and oversight for all UK network services outsourced to a network Service Provider (NSP – currently British Telecom). This role demands a strong technical background, coupled with a holistic ITIL Service based mentality and experience managing Service Providers. The role demands the ability to balance operational stability against the responsiveness to business requirements.

Responsibilities

• Manage workloads, which will involve setting prioritises and delegating activities to team members
• As a senior team member, you will act as mentor to inexperienced team members
• Accountable for end-to-end administration of Network, F5 and Forescout technologies
• Responsible to manage end to end process of firewall management/administration
• Configuring and troubleshooting issues related to Cisco switches (Nexus) and routers (ASR/ISR)
• Configuring and maintaining F5 load balancers and troubleshooting F5 related issues
• Work closely with technology services teams and put-up action plan for firewall OS /patch upgrades, rebuild etc.
• Service request fulfillment for firewall global policy and other security extension changes (VPN, IPS, URL Filtering, Application Control, etc.)
• Providing technical network infrastructure assistance and guidance to business relationship managers, project managers, infrastructure managers and other technical and non-technical staff
• Work with the NSP to assess and interpret high-level network related requirements and provide the most appropriate solution design to meet business benefits and preferable outcome for the cost and effectiveness of ongoing usage
• Evaluating detailed solution design instructions and assessing the quality of the produced solution. Can clearly articulate solution dependencies beyond the technology itself and ensure that a cohesive business solution will result.
• Act as a technical interface and liaison with internal technical staff and 3rd parties who will implement technologies not supported by the NSP
• Raising simple and complex service requests with the NSP using appropriate method
• Raising Request for Change records (RFCs)
• Technical governance and approval of change requests, ensuring RFCs are within technical standards and underpin a cohesive support framework
• Providing guidance and support to the Infrastructure Operations Centre (IOC) and NSP for major incidents, including attendance on emergency Change Approval Board (CAB) meetings
• Working with Problem Management team and NSP to identify problems and assist in treatment plans, raising RFCs with NSP where appropriate
• Working with Deloitte and NSP Capacity teams to forecast infrastructure usage requirements and engage with Network service owner and NSP to adjust capacity of services as necessary
• Quantifying areas of improvement for key processes and services with Service Provider
• Attend NSP Service Review meetings and provide feedback on Service and key metrics against contractual framework
• Working with Service Manager on continuous service improvement plans, engaging internal IT teams and NSP to implement required improvements
• Ability to assess statement of works from NSP and ensure they are in line with expectations and that the assumptions made by the NSP are valid

Must Have

• Cisco Certified Network Associate (CCNA) Certification
• Strong experience in designing, transitioning, and operating Cisco LAN technologies and routing protocols (EIGRP, OSPF, RIP, BGP) in an enterprise environment (national and global)
• Good knowledge of Palo Alto and Checkpoint firewalls
• Knowledge of LAN/WAN and network protocols
• Advanced level skill in firewall policy management
• Planning for firewall OS and management upgradation
• Experience in F5 Load balancing (LTM and GTM)
• Strong experience managing IP networks and supporting infrastructure (DHCP, DNS)
• Knowledge of network architecture and web related protocols (e.g., TCP/IP, UDP, IPSEC, HTTP/S)
• Working knowledge and understanding of Cisco ACI infrastructure
• IPSEC VPN troubleshooting
• Proven Service Management (ITIL) experience, specifically incident, problem and change
• management
• Excellent written and verbal communication skills, with a focus on translating technically complex issues into simple, easy to understand concepts
• Willingness to learn additional technologies, not focused on a single technology/application
• Be able to collaborate with clients, identify engagement, follow-on opportunities, and have a strong desire to excel
• Ability to work in virtual teams, offering support to team members remotely
• Demonstratable experience of coaching others to deliver quality work

Tools and Technologies

Network:

• Cisco Nexus Switches
• Cisco ACI Network
• Cisco ISR Router
• Cisco Wireless Access Points
• Cisco Wireless LAN Controller
• Cisco DNA Centre

Network Security:

• Forescout
• F5 load balancer
• Arbor DDOS

Perimeter Security:

• Palo Alto Firewall
• Checkpoint Firewall

Technical Certifications (Good to have)

• ITIL v3 or v4 Foundation
• Palo Alo or Check Point Firewall Certification
• PCSA, CCSA
• CCNP certification
• CCNA wireless certification

IR35

As a means of managing tax, commercial and reputational risks, Deloitte prohibits the use of Associates through Personal Service Companies (‘PSCs’). All Associates must contract under PAYE arrangements through a Deloitte approved ‘Employment Company’ (aka ‘umbrella company.’)