Infrastructure Security Design in London

What you'll be doing:

Working under direct supervision, you will apply your developing expertise in network security, infrastructure technologies, and security controls to support the design, implementation, and maintenance of secure infrastructure solutions. You will contribute to infrastructure security projects, perform security configurations, and develop your skills across network security technologies while receiving regular guidance from senior team members.

KEY RESPONSIBILITIES

• Infrastructure Security Implementation Support
  • Assist in implementing network security controls including firewalls, IPS/IDS, and proxies under supervision.
  • Configure basic network security policies and access control lists following approved designs.
  • Support network segmentation implementations and VLAN configurations.
  • Assist with VPN setup and secure remote access solution deployments.
  • Document network security configurations and changes accurately.
  • Perform routine security device maintenance and updates under guidance.
• Security Technology Configuration
  • Support deployment and configuration of security technologies including SIEM, EDR, and endpoint protection.
  • Assist in integrating security tools with existing infrastructure under supervision.
  • Configure security monitoring rules and alerts based on approved templates.
  • Support security technology testing and validation activities.
  • Maintain security tool inventories and configuration documentation.
  • Troubleshoot basic security technology issues with senior guidance.
• Security Configuration and Hardening
  • Apply security hardening standards to servers, workstations, and network devices under supervision.
  • Implement CIS Benchmark configurations for Windows and Linux systems.
  • Perform security baseline assessments using automated scanning tools.
  • Document configuration compliance status and exceptions.
  • Support remediation activities for configuration vulnerabilities.
  • Maintain secure configuration templates and standard operating procedures.
• Security Monitoring and Incident Support
  • Monitor security alerts and events from SIEM and security tools under guidance.
  • Perform initial triage of security incidents and escalate appropriately.
  • Assist in security incident investigations and evidence collection.
  • Document security incidents and response actions taken.
  • Support routine security health checks and operational tasks.
  • Contribute to security monitoring process improvements.
• Technical Documentation and Reporting
  • Create and maintain accurate technical documentation for security implementations.
  • Produce network diagrams, configuration guides, and runbooks under supervision.
  • Document security procedures and operational workflows.
  • Contribute to knowledge base articles and technical wikis.
  • Prepare routine security status reports and metrics.
  • Maintain project documentation and deliverable repositories.
• Security Testing and Validation
  • Perform straightforward security testing activities under supervision.
  • Conduct vulnerability scans and analyse results with guidance.
  • Validate security control implementations against requirements.
  • Support penetration testing activities and remediation verification.
  • Test security patches and updates in lab environments.
  • Document testing results and findings clearly.

KEY PERFORMANCE INDICATORS

• Quality and accuracy of security configurations and implementations completed.
• Timeliness in completing assigned tasks and project deliverables.
• Quality of technical documentation and knowledge contributions.
• Responsiveness to security incidents and monitoring alerts.
• Progress in professional development and certification achievements.
• Ability to work independently on routine tasks while seeking guidance appropriately.

What experience you'll bring:

REQUIRED SKILLS & COMPETENCIES

• Foundational Security Technical Skills
  • Basic understanding of network security principles and architectures.
  • Familiarity with firewall concepts and basic configuration (Palo Alto, Cisco ASA, Fortinet).
  • Knowledge of common security technologies (antivirus, IPS/IDS, proxies).
  • Understanding of Windows and Linux operating system security.
  • Basic scripting skills (PowerShell, Bash, Python) for automation tasks.
• Network and Infrastructure Fundamentals
  • Network protocols: TCP/IP fundamentals, routing basics, switching, VLANs.
  • Network services: DNS, DHCP, NTP, Active Directory basics.
  • Virtualization: Basic VMware or Hyper-V knowledge.
  • Operating systems: Windows Server administration, Linux command line.
  • Cloud basics: Awareness of AWS, Azure, or GCP security concepts.
• Security Tools and Technologies
  • Experience with or willingness to learn SIEM platforms (Splunk, QRadar, Sentinel).
  • Familiarity with endpoint protection platforms (CrowdStrike, Carbon Black, Defender).
  • Knowledge of vulnerability scanning tools (Nessus, Qualys, OpenVAS).
  • Understanding of network monitoring and packet analysis tools.
  • Basic knowledge of security automation and orchestration concepts.
• Professional Skills
  • Strong attention to detail and accuracy in technical work.
  • Good written and verbal communication skills.
  • Ability to follow documented procedures and best practices.
  • Willingness to learn and develop new technical skills.
  • Team collaboration and ability to seek guidance when needed.
  • Time management and prioritisation of assigned tasks.

Certifications Required

• Security+ or equivalent foundation security certification - Mandatory.
• Network+ or CCNA certification - Required or in progress.
• Microsoft or Linux certification - Preferred.
• Working toward: CCNA Security, SSCP, or vendor security certifications.

MINIMUM QUALIFICATIONS

Experience

• 2-4 years of experience in IT infrastructure, networking, or systems administration.
• 1-2 years exposure to security technologies and practices.
• Hands-on experience with network devices and security tools.
• Experience working in team environments on technical projects.
• Demonstrated interest in developing cybersecurity career.

Who we are:

At NTT DATA, you have endless opportunities to think big, act bold and take ownership. As a $30+ billion business and technology services, AI and digital infrastructure leader, we co-innovate solutions with clients and partners globally for business and societal impact. Serving 75% of the Fortune Global 100, with experts in over 70 countries, we encourage experimentation and recognise great work. Proudly a Global Top Employer, NTT DATA is part of NTT Group, which invests over $3 billion annually in R&D. Make this the place where you belong, learn, and build your network. Make this the place where you grow.

What we'll offer you:

We offer a range of tailored benefits that support your physical, emotional, and financial wellbeing. Our Learning and Development team ensure that there are continuous growth and development opportunities for our people. We also offer the opportunity to have flexible work options.

We are an equal opportunities employer. We believe in the fair treatment of all our employees and commit to promoting equity and diversity in our employment practices. We are also a proud Disability Confident Committed Employer - we are committed to creating a diverse and inclusive workforce. We actively collaborate with individuals who have disabilities and long-term health conditions which have an effect on their ability to do normal daily activities, ensuring that barriers are eliminated when it comes to employment opportunities. In line with our commitment, we guarantee an interview to applicants who declare to us, during the application process, that they have a disability and meet the minimum requirements for the role. If you require any reasonable adjustments during the recruitment process, please let us know. Join us in building a truly diverse and empowered team.