Network Design Engineer

Adecco (Portugal); City Of London; On-site; GBP 72,000 - 88,000; Full time

Job summary

Our client in Central London is seeking a Network Design Engineer to own the design and architecture of enterprise network solutions. You will lead across LAN, WAN and Wireless, translating business requirements into scalable, secure designs and producing high-quality documentation.

You will collaborate with stakeholders, delivery teams and vendors, provide technical leadership, and guide projects from discovery through implementation, including design governance and risk assessment.

Qualifications

• Extensive experience designing enterprise LAN/WAN/Wi‑Fi networks.
• Strong routing and switching knowledge: BGP, OSPF, VRRP, STP.
• Experience designing secure network architectures (firewalls, VPN, NAC).
• Proven ability to produce professional design docs (HLDs/LLDs).
• Experience with Ekahau Wi‑Fi surveys and predictive modelling.
• Ability to translate business needs into scalable designs.
• Excellent stakeholder management and presentation skills.

Responsibilities

• Lead design of enterprise LAN, WAN, WLAN and security solutions.
• Produce High-Level and Low-Level Designs and topology diagrams.
• Conduct network discovery, requirements gathering workshops.
• Perform capacity planning, resilience assessments and roadmapping.
• Develop migration and transformation strategies with minimal disruption.
• Create BoMs, statements of work and technical proposals.
• Provide governance and design assurance throughout projects.

Skills

Enterprise LAN/WAN/Wi-Fi design

Routing & Switching

Security architecture design

Design documentation

Network audits

Ekahau Wi-Fi surveys

Bills of Materials

Stakeholder management

Pre-sales support

Tools

Ekahau

HLD/LLD tooling

Job description

Network Design Engineer

Location: Central London (Office Based)

Salary: £80,000 + Training & Career Development

Our client designs, delivers and supports resilient technology environments for some of the most respected brands across the UK and Europe. Their expertise spans enterprise networking, wireless infrastructure, SD-WAN, security, cloud connectivity, CCTV, IPTV, VoIP and critical backend systems.

We are seeking an experienced Network Design Engineer to take ownership of the design and architecture of complex network solutions for enterprise customers. You will work closely with clients, stakeholders and internal delivery teams to develop scalable, resilient and secure network architectures that align with business objectives and future growth plans.

This is a highly consultative role focused on translating business requirements into technical network solutions, producing high-quality design documentation, and providing technical leadership throughout the project lifecycle.

Strong communication skills are essential, as you will regularly engage with both technical and non-technical stakeholders to present recommendations, justify design decisions and ensure successful project outcomes.

Key Responsibilities

• Extensive networking knowledge with demonstrable expertise in Wi‑Fi, LAN, and associated network services, including configuration, monitoring, security, and troubleshooting.
• Lead network discovery, assessment and requirements-gathering workshops with clients.
• Design enterprise LAN, WAN, WLAN and network security solutions for greenfield and existing environments.
• Produce High-Level Designs (HLDs), Low‑Level Designs (LLDs), network topology diagrams and implementation documentation.
• Perform network capacity planning, resilience assessments and technology roadmapping.
• Develop network migration and transformation strategies with minimal operational disruption.
• Design wireless solutions using predictive and on‑site survey methodologies, including Ekahau and equivalent platforms.
• Create Bills of Materials (BoMs), statements of work and technical proposals for customer projects.
• Provide technical governance and design assurance throughout implementation phases.
• Evaluate emerging networking technologies and recommend solutions that improve scalability, performance, security and operational efficiency.
• Collaborate with project managers, delivery engineers and third‑party vendors to ensure successful solution deployment.
• Act as a technical subject matter expert during customer engagements, workshops and pre‑sales activities.

Key Requirements

Essential

• Extensive experience designing enterprise network solutions across LAN, WAN and Wireless infrastructures.
• Strong understanding of routing and switching technologies, including BGP, OSPF, VRRP, STP and network segmentation principles.
• Experience designing secure network architectures including firewalls, VPNs, NAC and network access controls.
• Proven experience producing professional design documentation, including HLDs, LLDs, implementation plans and technical recommendations.
• Experience conducting network audits, health checks and infrastructure assessments.
• Strong knowledge of enterprise wireless technologies and hands‑on experience performing Ekahau (or equivalent) Wi‑Fi surveys, predictive modelling and reporting.
• Experience creating technical proposals, solution designs and Bills of Materials (BoMs).
• Ability to translate business requirements into scalable and resilient technical solutions.
• Excellent stakeholder management, presentation and consultancy skills.

Desirable

• Experience with Cisco Catalyst, Cisco Meraki, Aruba, HPE, RUCKUS or Juniper networking solutions.
• Knowledge of SD‑WAN, SASE and cloud networking architectures.
• Exposure to Azure, AWS or hybrid cloud connectivity design.
• Experience working within hospitality, retail, healthcare or multi‑site enterprise environments.
• Understanding of network automation and infrastructure‑as‑code principles.

Certifications

Relevant professional certifications are highly desirable, including:

• Cisco CCNP Enterprise / CCNP Wireless / CCIE
• CWNA / CWDP
• Cisco Meraki Solutions Specialist
• Aruba Certified Design Professional (ACDP)
• Fortinet NSE
• HPE Network Campus Access Professional
• RUCKUS Certified Wi‑Fi Associate (RCWA)
• CCNA (minimum desirable)