Network Security Engineer (Cisco Umbrella)

Nets-international Communication
Croydon, United Kingdom
15 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Intermediate

Job location

Croydon, United Kingdom

Tech stack

Microsoft Windows
Amazon Web Services (AWS)
Apple Mac Systems
Software System Penetration Testing
Azure
Bash
Border Gateway Protocol
Ubuntu (Operating System)
CentOS
Cisco PIX
Cloud Computing
Cloud Computing Security
Configuration Management
Control Objectives for Information and Related Technology (COBIT)
Computer Networks
Dynamic Host Configuration Protocol
Debian Linux
Linux
DNS
Hyper-V
Identity and Access Management
Internet Protocol Security (IP SEC)
Intrusion Detection Systems
Virtual Private Networks (VPN)
Python
Network Security
Network Architecture
Routing
Network Protocols
Open Shortest Path First
PCI Data Security Standards
Powershell
Ansible
Web Application Security
Security Information and Event Management
TCP/IP
Software Vulnerability Management
Scripting (Bash/Python/Go/Ruby)
Transport Layer Security
Google Cloud Platform
System Availability
QRadar
Firewalls (Computer Science)
Information Technology
SolarWinds (Software)
Operational Systems
Fortinet
Terraform
Splunk
New Relic (SaaS)
Devsecops
Cisco networks
Vulnerability Analysis
VMware

Job description

We are seeking a skilled Network Security Engineer to join our dynamic team. The ideal candidate will be responsible for ensuring the security of our network infrastructure, implementing security measures, and responding to incidents. This role requires a deep understanding of network protocols, security standards, and the ability to analyze and mitigate vulnerabilities within our systems., * Design, configure, and manage secure network architectures (LAN, WAN, and cloud) integrated with Cisco Umbrella Security solutions.

  • Implement and manage firewalls (Cisco ASA / FortiGate), IDS/IPS, and SIEM tools (Splunk, QRadar) for real-time threat detection and response.
  • Conduct regular security audits, penetration testing, and vulnerability assessments to identify and mitigate risks.
  • Develop and enforce network and cloud security policies in alignment with NIST and ISO 27001 frameworks.
  • Manage DNS-layer protection, secure web gateways, and threat intelligence through Cisco Umbrella.
  • Support incident response, investigation, and recovery to ensure minimal service disruption.
  • Collaborate with IT infrastructure teams to strengthen identity & access management, patching, and endpoint protection.
  • Implement secure VPN, IPsec, and SSL/TLS encryption for data in transit.
  • Monitor network performance using SolarWinds, New Relic, or similar tools to maintain high availability and reliability.
  • Provide security guidance for cloud deployments (AWS, Azure, GCP) and virtualization environments (VMware, Hyper-V).
  • Stay current on emerging threats, Cisco Umbrella advancements, and global cybersecurity trends.

Requirements

Do you have experience in macOS?, Do you have a Bachelor's degree?, * Strong understanding of computer networking concepts - routing (OSPF, BGP), TCP/IP, DNS, DHCP, and VPN technologies.

  • Hands-on experience with Cisco Umbrella, Cisco ASA, and Cisco Meraki for DNS-layer and network perimeter protection.
  • Familiarity with IDS/IPS, SIEM (Splunk, QRadar), and vulnerability management tools.
  • Knowledge of cloud-security principles, IAM, and secure integration across hybrid environments.
  • Proficiency with operating systems - Windows, Linux (Debian, CentOS, Ubuntu), and macOS.
  • Scripting knowledge (Python, Bash, PowerShell) for automation and configuration management.
  • Experience with DevSecOps tools such as Terraform, Ansible, or CI/CD pipelines for secure deployment workflows.
  • Understanding of compliance frameworks - PCI-DSS, COBIT, FedRAMP, and ISO 27001.
  • Strong analytical, problem-solving, and communication skills with attention to detail.

Job Type: Full-time, * Bachelor's (required), * Network Security Engineer (Cisco Umbrella): 3 years (required)

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