Senior Network Security Engineer

Opticore IT are currently searching for a Proxy Specialist to support our Financial Services client. You will lead and support the transition from Bluecoat proxy infrastructure to a new FortiProxy (Web Secure Gateway), ensuring a seamless, secure, and effective migration. The design, BOM, and migration approach are already in place. Opticore IT is a specialist Network Engineer and Project Management consultancy offering a wide variety of opportunities to work within fast-paced, challenging environments across our client base spanning multiple sectors including Finance, Broadcast Media, Telecommunications and more. You'll join our excellent team, based in the London area, on an initial 6-month contract, inside IR35, with scope to extend. Requiring 1-2 days a week in our client's HQ in the Central London area.

What you'll be doing:

• Lead the migration from Bluecoat proxy solutions to FortiProxy (Web Secure Gateway).
• Design, implement, and test the new proxy solution, ensuring business continuity and minimal disruption.
• Work closely with stakeholders to define migration strategy, timelines, and requirements.
• Develop detailed migration plans, risk assessments, and contingency measures.
• Provide hands-on technical expertise in configuration, troubleshooting, and optimisation of proxy infrastructure.
• Collaborate with internal IT, security, and network teams to ensure integration with existing systems (firewalls, VPNs, etc.).
• Conduct testing, validation, and tuning of the new proxy solution to ensure it meets performance, security, and compliance standards.
• Develop and maintain comprehensive technical documentation for the migration process and new proxy solution.
• Provide support for any post-migration issues, ensuring timely resolution.
• Train and hand over operations to the internal network/security team once the migration is complete.

What you'll bring:

• Expertise in FortiProxy, Web Secure Gateway.
• Bringing a consultative level of approach, but this is a hands-on opportunity.
• Proven history in proxy migration projects; the migration is from Bluecoat to FortiProxy (Web Secure Gateway).
• Solid understanding of Bluecoat.
• Strong background in network security, including web filtering, SSL inspection, and data loss prevention (DLP).
• Expertise in proxy server architecture, deployment best practices, and optimising performance.
• Previous working knowledge of policy creation and migration (URL filtering, access control, etc.).
• Knowledge of SSL decryption and inspection on proxy appliances.
• Strong understanding of TCP/IP, HTTP/S protocols, and other web-related traffic.

Diversity: At Opticore IT we embrace diversity and are committed to equal opportunities. We actively recruit for an inclusive and diverse workforce, and as such, we want to ensure we do everything we can to support your application. We want you to feel empowered to let us know if you require any adjustments to be made with your application or interview process, so please speak to our recruitment team.