ECS Resource Group
Senior Network Engineer (SonicWall Migration)
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Senior Network Engineer (SonicWall Migration)
Location: Hampshire (Hybrid)
Rate: Outside IR35, competitive based on experience
Contract: Initial 2 Months
Immediate Start
We are looking for an experienced Senior Network Engineer to lead a business-critical network infrastructure relocation and SonicWall firewall migration project.
This is a hands-on delivery role requiring proven experience with SonicWall firewalls, VPN configuration, routing, switching and network cutovers. The successful consultant will take ownership of migrating an existing SonicWall NSa 2700 to a new NSa 2800, ensuring minimal disruption to business operations.
Key Responsibilities
- Lead the discovery, design and delivery of the network migration.
- Review and document the existing firewall, routing, VLAN, NAT, DHCP and VPN environment.
- Configure and migrate an existing SonicWall NSa 2700 to a SonicWall NSa 2800.
- Configure and validate site-to-site VPN connectivity between offices, Azure and third-party environments.
- Migrate and support SSL VPN remote access services for approximately 150-180 users.
- Configure firewall policies, security rules, routing, NAT and DNS settings.
- Build and test the new environment alongside the existing infrastructure.
- Produce migration plans, testing procedures and rollback documentation.
- Lead the network cutover and troubleshoot firewall, VPN and connectivity issues.
- Provide post-migration support and technical handover.
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Essential Skills & Experience
- Strong hands-on experience with SonicWall firewalls, ideally NSa appliances.
- Proven experience delivering SonicWall firewall migrations, upgrades or replacements.
- Extensive experience configuring and troubleshooting:
- Site-to-Site VPNs
- IPSec VPNs
- SSL VPNs / NetExtender
- Strong understanding of routing, switching, VLANs, NAT, DHCP and DNS.
- Experience connecting on-premise environments into Microsoft Azure.
- Previous experience delivering network relocation, migration or infrastructure cutover projects.
- Ability to independently plan, configure, test and implement network changes.
- Strong technical documentation and stakeholder communication skills.
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Technical Requirements
- SonicWall NSa 2700 / NSa 2800
- Azure VPN Gateway and hybrid networking
- Ubiquiti UniFi switching and wireless
- Check Point firewalls
- Leased lines, internet circuits and data centre connectivity
- Experience supporting business-critical environments with minimal downtime
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