Job Title: Network and Security Engineer, Location: London (UK) On site, Job Type: Full Time.
We are seeking a talented and experienced Network and Security Engineer to join our team. The ideal candidate will have a strong background in networking and security, excellent problem‑solving skills, and a passion for learning and developing new skills.
Key Responsibilities
Networking, Segmentation, Optimization and Maintenance
* Design, configure and implement highly scalable L2/L3 networks using various protocols and vendor equipment.
* Monitor network traffic and analyse security incidents to detect and respond to threats within mobile network environments.
* Diagnose and troubleshoot network‑related issues associated with L1‑L7 using a variety of tools, ensuring quick recovery and minimum network downtime.
* Carry out periodic backups of network device operating system and configurations to ensure timely restoration of critical network services.
* Design and implement network security solutions such as policies, IPS, SSLVPN, IPSec VPN and security profiles using next‑generation firewalls (FortiGate/Palo Alto).
* Develop and apply network segmentation strategies to strengthen security and safeguard sensitive information within the core network.
* Work closely with other teams to establish and enforce network access policies, ensuring that only authorized individuals and devices have the correct access privileges.
Proactive Security Testing and Vulnerability Management
* Conduct vulnerability assessments and penetration testing to identify and address security weaknesses in mobile network architectures.
* Develop and enforce security policies and procedures to ensure compliance with industry standards and regulations.
* Design and implement security protocols and solutions to protect network infrastructure.
* Work together with system administrators and application owners to resolve discovered vulnerabilities by applying necessary patches or making configuration adjustments.
* Create and sustain a thorough vulnerability management program that includes tracking vulnerabilities, assessing risks, and planning remediation strategies.
* Engage in network security incident response efforts by providing technical expertise and supporting investigations when needed.
* Stay updated with the latest security trends, threats, and technologies, particularly related to 3GPP standards and mobile networks.
* Collaborate with IT and engineering teams to integrate security measures into network architecture, including mobile network elements.
* Respond to security breaches and provide incident response and disaster recovery support.
Qualifications / Skills
* Bachelor’s degree in computer science, information security, or a related field (or equivalent work experience).
* Master’s degree in cybersecurity or networking is desirable.
* Proven experience as a Network and Security Engineer or similar role, with focus on IP network design, implementation, troubleshooting and mobile network security.
* Understanding of 3GPP mobile network core and RAN architectures and security requirements.
* Strong knowledge of network security protocols, VPN, firewall management, and intrusion detection systems.
* Experience with security tools such as SIEM, IDS/IPS, and vulnerability scanners.
* Familiarity with regulatory standards and frameworks (e.g., GDPR, HIPAA, ISO 27001).
* In‑depth understanding of routers, switches, firewalls, and switching/routing protocols – such as VLAN, VTP, STP, RSTP, MST, OSPF, EIGRP and BGP.
* Monitoring solutions which include PRTG, SolarWinds and Zabbix, and knowledge of virtualization technologies such as ESXi, KVM, Proxmox and Hyper‑V.
* Relevant industry certifications such as CCNA, CCNP, CISSP, CISM, CEH, CompTIA Security+, AZ‑500 and GCP PCSE are highly desirable.
* Excellent analytical and problem‑solving skills with the ability to troubleshoot complex issues.
* Strong communication skills and the ability to work effectively in a team environment.
This role requires daily physical/ onsite reporting in the office.
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