Senior Network Security Engineer IV - UK
Confirmed on the employer's own hiring board on Oct 29, 2026. First seen by Alion on Oct 27, 2026. Rackspace Technology scores A on the Alion truth index.
The Senior Network Security Engineer (L4) is a crucial element within the Rackspace support infrastructure and is expected to provide an expert level of technical guidance 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.
Key Responsibilities
- 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.
Skills/Knowledge
- Required - working knowledge of NSX-T, Palo Alto, Cisco FirePower, F5.
- Desirable - working knowledge of Fortigate, Azure, Cisco Nexus, Panaroma, ACI, Cloudflare.
- At least ONE relevant networking certification e.g. CCNA/P.
Critical Competencies
- Excellence: Exceeds expectations by consistently demonstrating accountability, discipline, high performance, and a proven track record of exceptional results.
- Customer-driven: Prioritizes customer needs and satisfaction through collaborative and proactive problem-solving, and an unwavering commitment to customer success.
- Expertise: Possesses deep understanding of customer needs and continually grows and enhances skills to provide customer-focused solutions.
- Agility: Quickly adapts and responds to dynamic customer needs and expectations through innovative solutions.
- Compassion: Cultivates a positive and supportive environment to effectively work together towards a common goal, fostering trust within Rackspace and with external stakeholders.
Career Level Summary
- 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
- Solves complex problems
- Works independently, receives minimal guidance
- May lead projects or project steps within a broader project or may have accountability for on-going activities or objectives
- Acts as a resource for colleagues with less experience
Our compensation reflects the cost of labor across several geographic markets. The compensation range for this position ranges from £48,101.00/year in our lowest geographic market up to £62,315.00/year in our highest geographic market. Pay is based on a number of factors including market location and may vary depending on job-related knowledge, skills, and experience. Your recruiter can share more about the specific salary range for your preferred location during the hiring process. The compensation package may also include incentive compensation opportunities in the form of annual bonus or incentives, equity awards and an Employee Stock Purchase Plan (ESPP). Learn more about benefits at Rackspace.
About Rackspace Technology
Rackspace Technology is the trusted operator of the full enterprise AI stack, from governed private cloud to AI inference and agents in production. From edge to core to cloud, we operate the infrastructure, data layer, and software integration to deliver business outcomes with the predictable cost, reliability, security, and compliance that regulated and mission-critical environments demand. We support customers in more than 120 countries with AI capabilities spanning private cloud, public cloud, applications, data and cyber resilience.
More on Rackspace Technology
Though we’re all different, Rackers thrive through our connection to a central goal: to be a valued member of a winning team on an inspiring mission. We bring our whole selves to work every day. And we embrace the notion that unique perspectives fuel innovation and enable us to best serve our customers and communities around the globe. We welcome you to apply today and want you to know that we are committed to offering equal employment opportunity without regard to age, color, disability, gender reassignment or identity or expression, genetic information, marital or civil partner status, pregnancy or maternity status, military or veteran status, nationality, ethnic or national origin, race, religion or belief, sexual orientation, or any legally protected characteristic. If you have a disability or special need that requires accommodation, please let us know.