Network Security Architect - Firewalls, DNS, Onpremise, Cloud

Network Security Architect

Location: London (3 Days Onsite / 2 Days Remote)

Contract Length: 6+ Months

Rate: £750 per day

IR35 Status: Inside IR35

We are seeking an experienced Network Security Architect to join a high-profile organisation based in London on an initial 6-month contract. This is an exciting opportunity to play a key role in designing, implementing, and enhancing secure network infrastructure across both on-premise and cloud environments.

You will be responsible for defining network security architecture, driving best practice, and ensuring the resilience, scalability, and security of critical enterprise systems.

Required Skills & Experience

Proven experience as a Network Security Architect within large-scale enterprise environments.

Strong expertise in:

DNS architecture and security

Next-generation firewalls (Palo Alto, Check Point, Fortinet, Cisco Firepower or similar)

Network segmentation and micro-segmentation

Secure remote access and VPN technologies

Load balancing and traffic management

DDoS protection and network threat mitigation

Experience designing and securing both:

On-premise network infrastructure

Public cloud environments (Azure, AWS, or Google Cloud)

Strong understanding of:

Zero Trust Architecture

Network Access Control (NAC)

IDS/IPS technologies

Routing and switching protocols

Security frameworks and regulatory standards

Experience producing High-Level and Low-Level Design documentation (HLDs/LLDs).

Excellent stakeholder management and communication skills. Desirable Skills

Experience within highly regulated environments.

Knowledge of cloud-native security services.

Exposure to Software Defined Networking (SDN).

Relevant certifications such as:

CISSP

CCNP Security / CCIE Security

Palo Alto PCNSE

Azure Security Engineer Associate

AWS Security Specialty If you are an experienced Network Security Architect with strong expertise across DNS, firewall technologies, cloud security, and enterprise network architecture, we'd love to hear from you