Senior Network Engineer with SC Cleared

ZipRecruiter; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading company in the technology sector is seeking a Senior Network Engineer to manage complex network infrastructures. The ideal candidate will have deep expertise in Cisco systems, SDN technologies, and a strong background in network automation, ensuring high performance and availability in a dynamic environment. Responsibilities include leading deployments, troubleshooting networking issues, and collaborating with cross-functional teams. This Inside IR35 contract role requires active SC Clearance.

Qualifications

• Active SC Clearance required.
• Hands-on experience with Cisco ACI, SDN, and MSO.
• Expertise with Cisco appliances (Nexus, Catalyst, Firepower).

Responsibilities

• Lead deployment and management of Cisco ACI and MSO environments.
• Provide support for Cisco networking/security appliances.
• Utilize automation tools for networking tasks.

Skills

Software Defined Networking

Network Automation

Scripting

Interpersonal Skills

Communication Skills

Education

CCNP Certification

ITIL v3 Foundation Certification

Tools

Ansible

F5 Load Balancers

Cisco ACI

Infoblox Suite

Network Monitoring Tools

Job description

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:
• Cisco ACI
• Wireless networking
• F5 load balancing (BigIP, BigIQ)
• Cisco campus networking
• Firewalls and Flow Analyzers (Checkpoint, Cisco Firepower, Algosec)
• Infoblox Suite (IPAM, DNS, DHCP)
• Network Monitoring/Management Tools (Entuity, PRTG, Prime Infrastructure)

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.

Important Notes:

• This is an Inside IR35 contract role.
• Active SC Clearance is a must — candidates without clearance will not be considered.