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Network Security Engineer III

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Rackspace

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Location:
United Kingdom , Cardiff

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Category:
IT - Administration

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

The Senior Network Security Engineer (L3) is a key element within the Rackspace support infrastructure and is expected to provide a high level of technical support to our customers via the phone, ticketing system, and automation. This role owns complex customer issues which may take several days or weeks to resolve and keeps our customers updated through every step of the process. You will be expected to take initiative and advise on potential pitfalls that a customer may encounter and suggest alternatives through automation, which may better serve the stability and security of the customer's solution. Technical issues can include troubleshooting customer network environments including firewall configurations, VPN technologies and access-control lists, VIP configurations, TCL (iRule) and Perl scripts, layer 4 thru 7 issues, etc. This role will support many elements of the Rackspace Cloud product portfolio, including RackConnect. You will create and maintain customer loyalty by providing Fanatical Experiences above and beyond customer expectations. You will also be responsible for adhering to company security policies and procedures and any other relevant policies and standards as directed.

Job Responsibility:

  • Configure, troubleshoot, and take escalations for Firewalls & Load Balancers, Windows/Linux system administration, or Cloud Native Tooling
  • Create documentation for support and operations tasks regarding the above tools
  • Configure, plan, install, maintain, and optimize network systems, equipment, and applications ensuring network protocols and security policies are used effectively
  • Solve engineering problems through the ownership of level appropriate customer requests and issues, seeing them through to resolution
  • Design, schedule and coordinate maintenances
  • Engineer and implement customized security solutions
  • Collaborate with Account Managers and Business Development Consultants to build strong customer relationships
  • Collaborate and share knowledge with other Engineers and Administrators
  • Mentor and train lower level Rackers
  • Other Incidental tasks related to the job, as necessary

Requirements:

  • Proven experience (7+ years) in Networking/Network Security
  • Requires in-depth conceptual and practical knowledge in own job discipline and basic knowledge of related job disciplines
  • At least ONE relevant networking certification e.g. CCNA/P
  • Required - working knowledge of NSX-T, Palo Alto, Cisco FirePower, F5

Nice to have:

Desirable - working knowledge of Fortigate, Azure, Cisco Nexus, Panaroma, ACI, Cloudflare

Additional Information:

Job Posted:
January 06, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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