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.