Job Title: Cisco Firewall Specialist (SC Cleared)
Location: London (Hybrid - 1-2 days per week onsite)
Contract: 6 months
Rate: £550 - £600 per day (Inside IR35)

About the Role:

83zero is excited to be partnered with a leading financial institution, looking for a Cisco Firewall Specialist to strengthen their security operations during a major upgrade phase.

This role will focus on the design, deployment, and support of Cisco security technologies-especially within Cisco ACI and Cisco ASA environments. The successful candidate will play a key role in supporting infrastructure upgrades and network security enhancements across the business.

Key Responsibilities:

• Lead the implementation and support of Cisco ACI and Cisco ASA solutions across enterprise-scale environments

• Conduct configuration, troubleshooting, and maintenance of firewalls and network security tools

• Work closely with cross-functional teams to deliver robust and secure infrastructure upgrades

• Support specific project workstreams, including:

  • ACI Upgrade (4.3 to 6.0)

  • MSO > NDO Migration

  • UCS Network Director (UCSD

• Contribute to risk assessments and continuous improvement of security posture

• Hybrid working model - with flexibility to attend the London office 1-2 times per week

Key Requirements:

• Active SC Clearance (required to start)

• Solid experience with Cisco ACI and Cisco ASA in large-scale environments

• Strong network security background, with expertise in firewall policies, risk mitigation, and infrastructure design

• Confident approach to new technologies and upgrades, including the ability to research and validate best practices

• Exposure to financial/banking environments is a bonus, not a must

• Excellent communication and collaboration skills, especially in hybrid working teams

If you're an SC-cleared Cisco Security Specialist looking to take on an exciting role with a top-tier financial organisation, we'd love to hear from you.

Apply today or get in touch for more info!