CrawlJobs Logo

Network Security Engineer L3

Czechia, Prague · Job Posted February 07, 2026
Apply Position
Job Link Share

Job Description

The Network Security Engineer L3 is an advanced engineering role, responsible for providing a professional remote technical support service to clients by identifying and resolving technical incidents and problems. Through pre-emptive service incident and resolution activities, this role will restore service to clients by driving incidents to an effective resolution and ensuring all requests, process events and resolution incidents result in zero missed service level agreement (SLA) conditions. This role has an hybrid model: 5 days per month on site, rest of the time working remotely in any place in Czechia.

Job Responsibility

  • Maintains the support process and ensures that requests for support are handled according to the procedures
  • Identifies and resolves problems following agreed procedures
  • Carries out agreed maintenance tasks
  • Ensures usage of knowledge articles in incident diagnosis and resolution and assist with updating as and when required
  • Performs defined tasks to monitor service delivery against service level agreements and maintains records of relevant information
  • Analyzes service records against agreed service levels regularly to identify actions required to maintain or improve levels of service, and initiates or reports these actions
  • Prioritizes and diagnoses incidents according to agreed procedures
  • Investigates causes of incidents and seeks resolution
  • Escalates unresolved incidents and follow up until incident is resolved
  • Provides service recovery, following resolution of incidents
  • Documents and closes resolved incidents according to agreed procedures
  • Maintains secure, accurate, complete, and current configuration on configuration items (CIs)
  • Applies tools, techniques and processes to track, log and correct information related to CIs, ensuring protection of assets and components from unauthorized change, diversion, and inappropriate use
  • Remotely investigates and identifies root cause of incidents and assist with the implementation of agreed remedies and preventative measures
  • Maintains knowledge of specific specialisms, provides detailed advice regarding their application
  • Ensures efficient and comprehensive resolution of incidents, including ensuring that repairs are carried out by coordinating product requests, working with other team members
  • Provides continuous feedback to clients and affected parties and update all systems, portals and ticketing tools as prescribed by standard operating procedures
  • Cooperates with all stakeholders including client IT environments, vendors, carriers and colleagues to expedite diagnosis of errors and problems and to identify a resolution
  • Creation of knowledge articles in incident diagnosis/resolution and assist with updating as and when required
  • Upgrades skills and enhance knowledge on latest products and technologies and complete required Certification

Requirements

  • Bachelor's degree or equivalent in Information Technology or Computing or related field
  • Professional level Certification in any of the different Networking Technologies like Cisco, Juniper, Checkpoint, PaloAlto, Fortinet, Aruba, BlueCoat, ZeeScaler 5 such as CCNP, JNCIS, ACCP, PCNSE, CCSE etc
  • English: Fluent (Mandatory)
  • Dutch: Fluent (Mandatory)
  • Seasoned experience in Security technologies such as Firewall, IPS, IDS, Proxy etc
  • Seasoned experience in technical support to clients
  • Seasoned experience in diagnosis and troubleshooting
  • Seasoned experience providing remote support in Security technologies
  • Seasoned experience in relevant technology
  • Knowledge of technical documentation
  • Knowledge on management agent concepts, redundancy concepts and remote console architecture within supported technical domain
  • Knowledge of vendor technologies, such as Cisco, Juniper, Checkpoint, Palo Alto, Fortinet, Aruba, BlueCoat, ZeeScaler...
  • Customer service orientated and pro-active thinker
  • Problem solver who is highly driven and self-organized
  • Great attention to detail
  • Good analytical and logical thinker
  • Excellent spoken and written communication skills
  • Team player with the ability to work well with others and in group with colleagues and stakeholders

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Network Security Engineer L3

8 matching positions

L3 Network Engineer & Msp Support Engineer

We seek an experienced L3 Network & MSP Support Engineer to provide advanced tec...
Location
Location
Salary
Salary:
Not provided
zazz.io Logo
Zazz
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong OSI model understanding
  • Ability to troubleshoot routing (BGP, OSPF), switching (VLAN, STP), and firewall (Cisco ASA, Palo Alto, Fortinet) issues
  • Understand WAN/VPN technologies, WiFi, DNS/DHCP
  • Familiar with network monitoring tools (PRTG, Datadog, Splunk)
  • Hands-on AWS and Azure experience troubleshooting real-world issues
  • Understand VPC/VNet, EC2/VM, security groups/NSGs, IAM basics
  • Experience with hybrid connectivity (Direct Connect, ExpressRoute)
  • Support experience with Exchange Online, SharePoint, Teams
  • Troubleshoot Intune device enrollment and policies
  • Support Entra ID authentication issues, conditional access, MFA
Job Responsibility
Job Responsibility
  • Own complex P1/P2 tickets escalated from L1/L2 teams
  • Troubleshoot and resolve network, cloud, identity, and security issues
  • Provide accurate technical documentation for each ticket
  • Meet and exceed SLA response/resolution times
  • Escalate appropriately when needed
  • Diagnose and resolve routing, switching, firewall, VPN, and WiFi connectivity issues
  • Troubleshoot WAN performance and site-to-site connectivity
  • Support DNS/DHCP problems
  • Resolve network-related client outages
  • Troubleshoot AWS and Azure connectivity and configuration issues
  • Fulltime
Read More
Arrow Right

L3 Network Engineer

We are seeking a highly skilled Network L3 Engineer / Architect / Manager with d...
Location
Location
India , Noida
Salary
Salary:
Not provided
Infinity Labs India
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong hands-on with Cisco ACI, Cisco DNAC, and enterprise-grade routers/switches
  • Proficient in routing, switching, and data center technologies
  • Solid experience in network architecture, planning, and documentation
  • Familiarity with Python scripting for automation (preferred)
  • 8-15 years experience
Job Responsibility
Job Responsibility
  • Lead network architecture and design using Cisco ACI and Cisco DNAC
  • Develop and maintain HLDs and LLDs for complex network environments
  • Configure and troubleshoot routing (BGP, OSPF) and switching technologies
  • Oversee large-scale network deployments and upgrades
  • Collaborate with cross-functional teams for seamless infrastructure integration
  • Ensure network security, scalability, and high availability
  • Automate tasks using Python (optional but preferred)
  • Provide technical leadership and mentor junior engineers
  • Fulltime
Read More
Arrow Right

Network Engineer L3

The Network Engineer L3 position requires over 8 years of experience in managing...
Location
Location
India , Mumbai, Maharashtra
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Over 8 years of experience in managing complex network infrastructures, including LAN, WAN, and cloud networking
  • Strong hands-on experience with Cisco ACI and SDWAN solutions
  • Relevant certifications like CCNP
  • Graduate degree in Science or Engineering is preferred
Job Responsibility
Job Responsibility
  • Configuring network solutions
  • Ensuring security
  • Collaborating with teams on network projects
Read More
Arrow Right

Network Security-L3 (Palo Alto)

As a Networking Managed Services Engineer (L3) at NTT DATA, you will lead in pro...
Location
Location
India , Mumbai
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proficiency in Pulse Secure SSL VPN, Virtual Juniper, Palo Alto, Fortinet Firewalls, Cisco Nexus switches, ASr and ISr routers, Cisco ACS, ISE, Meraki switches and access points, enterprise network architecture, routing protocols (BGP, OSPF, EIGrP), network address translation, and troubleshooting uplinks to ISPs for dIA, MPLS, and P2P circuits
  • Advanced Certifications on at least one or two above mentioned technologies
  • Excellent planning and project management abilities, taking changing circumstances into account
  • Strong communication skills, with the ability to work across different cultures and social groups
  • Effective active listening skills
  • A client-focused approach, prioritizing their requirements and creating positive experiences
  • Adaptability to changing circumstances and the ability to work diligently when necessary
  • A positive outlook and the ability to work well under pressure
  • A bachelor's degree in IT/Computing or equivalent work experience.
Job Responsibility
Job Responsibility
  • proactively identify and resolve technical incidents and problems
  • ensure clients meet all SLA conditions
  • identify root cause of critical incidents and implement solutions
  • manage high-complexity tickets
  • conduct thorough analyses and provide resolutions
  • coach and mentor junior team members
  • create knowledge articles and train junior team members
  • provide inputs to automation teams
  • ensure client infrastructure is configured, installed, tested, and operational
  • perform necessary checks and employ monitoring tools
  • Fulltime
Read More
Arrow Right

Network L3 Support Engineer

We are looking for an experienced Network L3 Support Engineer to join our team i...
Location
Location
Canada , Montreal
Salary
Salary:
115000.00 USD / Year
realign-llc.com Logo
Realign
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong experience in enterprise networking (routing & switching)
  • Knowledge of TCP/IP, BGP, OSPF, VLAN, STP, VPN technologies
  • Experience with Cisco / Juniper / Aruba network devices
  • Hands-on experience with network monitoring and troubleshooting tools
  • Understanding of network security concepts and firewall technologies
  • Strong analytical and problem-solving skills
Job Responsibility
Job Responsibility
  • Provide Level 3 support for complex network incidents and problems
  • Troubleshoot and resolve issues related to LAN, WAN, routing, switching, VPN, and firewall technologies
  • Perform root cause analysis and implement permanent fixes for recurring network issues
  • Monitor network performance and ensure optimal uptime and reliability
  • Work closely with NOC, L1/L2 teams, and infrastructure teams to resolve escalated issues
  • Manage network devices such as routers, switches, firewalls, and load balancers
  • Implement network configuration changes and upgrades following change management processes
  • Document troubleshooting steps, network configurations, and operational procedures
  • Participate in on-call rotation for critical network incidents
  • Fulltime
Read More
Arrow Right

Ms engineer (l3) - cyber security

As a Cross Technology Managed Services Engineer (L3) at NTT DATA, your primary r...
Location
Location
Australia , Melbourne
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Extensive Managed Services experience handling complex cross-technology infrastructure
  • Strong understanding of ITIL processes
  • Proven experience working with vendors and/or third parties
  • Ability to communicate and work across different cultures and social groups
  • Effective planning skills, even in changing circumstances
  • Positive outlook and ability to work well under pressure
  • Active listening skills and adaptability to changing client needs
  • Client-focused approach to create positive client experiences throughout their journey
  • Bachelor's degree or equivalent qualification in IT/Computing (or demonstrated equivalent work experience)
Job Responsibility
Job Responsibility
  • Provide exceptional service to clients by proactively identifying and resolving technical incidents
  • Ensure client infrastructure is configured, tested, and operational
  • Pre-emptive service incident resolution, product reviews, and operational improvements
  • Manage high-complexity tickets, perform advanced tasks, and provide diverse solutions
  • Ensure zero missed service level agreement (SLA) conditions
  • Mentor junior team members
  • Work across various technology domains such as Cloud, Security, Networking, and Applications
  • Conduct necessary checks, apply monitoring tools, and respond to alerts
  • Log incidents with the required level of detail
  • Analyse, assign, and escalate support calls
  • Fulltime
Read More
Arrow Right

Network and Security Engineer

This is an excellent opportunity for a motivated individual looking to advance t...
Location
Location
India , Bengaluru
Salary
Salary:
Not provided
cigres.com Logo
Cigres
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum 6 to 10 years experience
  • Strong knowledge of routing & switching (BGP, OSPF, EIGRP, VRF, QoS, MPLS, SD-WAN)
  • Hands-on experience with Cisco, Juniper, HP, or equivalent enterprise networking gear
  • Deep understanding of firewalls, IDS/IPS, WAF, DDoS protection, and VPN technologies
  • Experience with SIEM tools, log analysis, and incident response
  • Data Center networking (VLANs, VPC, HSRP, LACP, NAT, ACLs)
  • Mandatory skills: L3, Network Engineer L2, Firewall, Network Security, Switching
Job Responsibility
Job Responsibility
  • Monitor and maintain the security of the network & security infrastructure, including firewalls, VPNs, Load balancer, ISE and proxy systems
  • Implement security measures to protect sensitive information from unauthorized access
  • Analyze and respond to security incidents and breaches, providing timely resolutions
  • Collaborate with cross-functional teams to improve overall organizational security posture
  • Conduct regular vulnerability assessments and audits to identify potential security risks
  • Document security processes and create reporting metrics to track compliance and performance
  • Periodically update the system software, taking periodic backup and maintained device lifecycle
  • Lead the deployment, configuration, and optimization of network and security devices (routers, switches, firewalls, load balancers, VPNs, WAF, IDS/IPS, etc.)
  • Validate and implement network/security designs as per project requirements
  • Ensure compliance with security standards, policies, and regulatory requirements
  • Fulltime
Read More
Arrow Right

Security Support Services Engineer (L3)

The L3 Security Engineer for IPS, Proxy, and Malware Sandboxing will be a senior...
Location
Location
India , Kolkata
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Serve as the subject matter expert for all Next-Generation Firewall platforms, including hardware, virtual, and cloud-native firewalls (e.g. Palo Alto)
  • Design, implement, and maintain the bank's Anti-DDoS solution, including both on-premises appliances and cloud-based scrubbing services
  • Configure and maintain anti-DDoS solutions (such as Arbor) to mitigate volumetric and application-layer DDoS attacks
  • Monitor DDoS threats and fine-tune protection mechanisms to ensure network availability
  • Design, configure, implement complex security policies, network address translation (NAT), and VPN tunnels
  • Provide technical guidance and mentorship to L1 and L2 analysts
  • Act as the final escalation point (L3) for complex security incidents and problems, providing expert resolution and support
  • Participate in a 24x7 on-call rotation to provide incident management for mission-critical services
  • Sound analytical and troubleshooting skills and good Team Management & co-ordination skills
  • Contribute to the technology roadmap by researching, evaluating & recommending new security tools & capabilities
Job Responsibility
Job Responsibility
  • Serve as the subject matter expert for all Next-Generation Firewall platforms, including hardware, virtual, and cloud-native firewalls (e.g. Palo Alto)
  • Design, implement, and maintain the bank's Anti-DDoS solution, including both on-premises appliances and cloud-based scrubbing services
  • Configure and maintain anti-DDoS solutions (such as Arbor) to mitigate volumetric and application-layer DDoS attacks
  • Monitor DDoS threats and fine-tune protection mechanisms to ensure network availability
  • Design, configure, implement complex security policies, network address translation (NAT), and VPN tunnels
  • Provide technical guidance and mentorship to L1 and L2 analysts
  • Act as the final escalation point (L3) for complex security incidents and problems, providing expert resolution and support
  • Participate in a 24x7 on-call rotation to provide incident management for mission-critical services
  • Contribute to the technology roadmap by researching, evaluating & recommending new security tools & capabilities
  • Responsible for timely patch deployment, migration of firmware/software and deployment of configuration as part of migrated functionality, timely update of necessary signatures, and its functionality after taking complete precaution to avoid outage and downtime
  • Fulltime
Read More
Arrow Right