Senior Network Engineer with SC Cleared

JR United Kingdom; London; On-site; GBP 60,000 - 90,000; Full time

Job summary

A leading company in the tech sector is seeking a Senior Network Engineer to join their London team. This role requires extensive knowledge in Cisco ACI, SDN, and network security solutions. You'll design and support complex network infrastructures, ensuring high performance and availability while collaborating with various teams. Candidates must have active SC Clearance as this is an Inside IR35 contract role, and strong automation skills with tools like Ansible are preferred.

Qualifications

• Active SC Clearance is mandatory.
• Deep knowledge of Cisco ACI SDN and MSO is required.
• Strong expertise in wireless networking and firewall technologies.

Responsibilities

• Lead deployment and management of Cisco ACI SDN environments.
• Provide troubleshooting for Cisco networking appliances.
• Implement network monitoring tools and manage firewall security.

Skills

Cisco ACI

SDN

Networking

Security

Automation

Education

CCNP certification or equivalent

ITIL v3 Foundation certification

Tools

Ansible

F5 BigIP

Nexus

Firepower

Infoblox Suite

Job description

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Senior Network Engineer with SC Cleared, london

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Client:

Location:

london, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

31.05.2025

Expiry Date:

15.07.2025

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Job Description:

Job Overview:

We are seeking an experienced Senior Network Engineer with deep expertise in Cisco ACI, SDN technologies, and broader traditional networking and security solutions. The successful candidate will be responsible for the design, implementation, automation, and operational support of complex network infrastructures, ensuring high availability and performance across our environment.

Only candidates with active SC Clearance will be considered. This role is Inside IR35.

Key Responsibilities:

• Lead and support the deployment, configuration, and management of Cisco ACI SDN and MSO environments.
• Provide operational support and troubleshooting for Cisco networking and security appliances including Nexus, Catalyst switches, and Firepower/ASA firewalls.
• Design, implement, and optimize wireless networks and load balancing solutions (F5 BigIP, BigIQ).
• Manage campus networking environments, firewall security, and network monitoring solutions.
• Utilize automation tools like Ansible to streamline and automate manual networking tasks.
• Work with Infoblox Suite (IPAM, DNS, DHCP) for efficient IP address and domain management.
• Implement and maintain network monitoring tools such as Entuity, PRTG, and Prime Infrastructure.
• Adhere to ITIL processes and contribute to continuous process improvement initiatives.
• Collaborate cross-functionally with infrastructure, security, and application teams.

Minimum Qualifications:

• Active SC Clearance (mandatory).
• Deep knowledge and hands-on experience with Cisco ACI SDN and MSO (development and operations).
• Certification in Cisco networking (minimum CCNP level) or equivalent industry experience.
• Proven experience with traditional Cisco networking/security appliances: Nexus, Catalyst, ACI, Firepower/ASA.
• Strong expertise in at least 3 of the following areas:
• Wireless networking
• F5 load balancing (BigIP, BigIQ)
• Firewalls and Flow Analyzers (Checkpoint, Cisco Firepower, Algosec)
• Infoblox Suite (IPAM, DNS, DHCP)

Preferred Skills:

• Experience with Software Defined Networking (SDN) automation using Ansible or similar tools.
• Strong scripting skills for network automation and orchestration.
• ITIL v3 Foundation certification (or good knowledge of ITIL best practices).
• Excellent interpersonal and communication skills, with a proactive and solution-oriented mindset.
• This is an Inside IR35 contract role.
• Active SC Clearance is a must — candidates without clearance will not be considered.