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Network Security Engineer (L1)

Czechia, Prague · Job Posted April 12, 2026
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Job Description

As a Network Security Engineer (L1) at NTT DATA, you will be the first point of contact for our clients, ensuring their IT infrastructure and systems remain operational. You will proactively identify, investigate, and resolve technical incidents and problems, focusing on first-line support for standard and low-complexity incidents and service requests. Your aim? To ensure zero missed service level agreement conditions. Every day, you will monitor client infrastructure and solutions, identifying problems and errors before or as they occur. You will dive deep into first-line incidents assigned to you, pinpointing the root causes, and providing telephonic, ITSM ticket or chat support to our clients when they need it most. Maintenance activities, such as patching and configuration changes, will be part of your routine, ensuring the smooth operation of client systems. You will work across two or more technology domains, such as Cloud, Security, Networking, Applications, or Collaboration. Your day may include updating existing knowledge articles or creating new ones, seeking opportunities for work optimization, and supporting project work as needed. Additionally, you will contribute to disaster recovery functions and tests, ensuring our clients' DATA is safe and sound. This role requires to be available to work on shifts and during public holidays and/or weekends. Shift changes are made seamless with your careful handovers, ensuring service continuity. You will report and escalate incidents when necessary and strive for efficient, comprehensive resolutions of incidents and requests. With each interaction, you will aim to provide a positive client experience, placing their needs at the forefront of all you do.

Job Responsibility

  • Monitors client infrastructure and solutions, mainly with CISCO but also Juniper, Palo Alto, Aruba and Fortinet
  • Identifies problems and errors prior to or when they occur
  • Routinely identifies common incidents and opportunities for avoidance as well as general opportunities for incident reduction
  • Investigates first line incidents assigned and identifies the root cause of incidents and problems
  • Provides telephonic or chat support to clients when required
  • Schedules maintenance activity windows for patching and configuration changes
  • Follows the required handover procedures for shift changes to ensure service continuity
  • Reports and escalates incidents where necessary
  • Ensures the efficient and comprehensive resolutions of incidents and requests
  • Updates existing knowledge articles or create new ones
  • Identifies opportunities for work optimization including opportunities for automation of work, request fulfilment, incident resolution, and other general process improvement opportunities
  • May also contribute to / support on project work as and when required
  • May work on implementing and delivering disaster recovery functions and tests
  • Performs any other related task as required

Requirements

  • Bachelor's degree or equivalent qualification in IT/Computing (or demonstrated equivalent work experience)
  • Entry-level experience with troubleshooting and support in security, network, data centre, systems, or storage within a medium to large ICT organization
  • Basic knowledge of management agents, redundancy concepts, and ITIL processes
  • Good understanding of using ITSM tools
  • English: Fluent (Mandatory)
  • Highly disciplined in handling of tickets on day-to-day basis. Act promptly as per defined Sop’s
  • Skill in planning activities and projects in advance and adapting to changing circumstances
  • A client-centric approach, understanding their requirements and ensuring a positive experience
  • Ability to communicate and work across different cultures and social groups
  • Proficiency in active listening techniques and refraining from interrupting
  • A positive outlook at work, even in pressurized environments

Nice to have

  • CCNA and/or CCNA Security
  • experience with Service Now and/or Logic Monitor

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