2,170 Network Administrators jobs in the United Kingdom
Network Security Engineer
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Network Security Engineer
Posted today
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**Key Responsibilities** :
+ Design, configure, and support scalable and secure enterprise network architectures across hybrid environments (on-premises and AWS Cloud).
+ Implement and manage Cisco switching technologies and ensure optimal network performance and redundancy.
+ Configure and maintain Palo Alto Networks Firewalls (both physical and virtual), ensuring proper security policies and compliance.
+ Administer and optimize dynamic routing protocols such as OSPF and BGP for efficient network traffic flow.
+ Manage AWS networking components, including Transit Gateways, VPC Attachments, Security Groups, Endpoints, GWLB, ALB, NLB, and WAF.
+ Provide technical leadership in wireless technologies and oversee deployments using Meraki products.
+ Identify and implement automation opportunities to reduce manual intervention and operational overhead in collaboration with automation teams.
+ Troubleshoot complex network issues through strong analytical and logical reasoning skills to ensure minimum downtime.
+ Develop, update, and maintain detailed network documentation, architecture diagrams, and configuration standards.
+ Collaborate with cross-functional teams to support network integration, security, and performance initiatives.
**Required Skills**
+ Solid foundation in core networking concepts including TCP/IP, VLANs, DNS, DHCP, and subnetting.
+ Hands-on proficiency in Cisco Switching Technologies (Must).
+ Expertise in Palo Alto Networks Firewalls (Must).
+ Strong knowledge of Dynamic Routing Protocols - OSPF, BGP.
+ Extensive experience in AWS Networking - Transit Gateways, ALB/NLB, Security Groups, Endpoints, GWLB, WAF (Must).
+ Strong understanding of Wireless Networking, with hands-on experience using Meraki products.
+ Excellent logical thinking and troubleshooting skills to resolve complex technical issues (Must).
+ Proven automation skills to identify network improvement opportunities (Must).
+ Certifications preferred: CCNP, AWS Certified Advanced Networking, PCNSE (Palo Alto), or equivalent.
At Cognizant you will experience an exciting mix of innovation by design, creativity, collaboration, and efficiency within a framework of stimulating objectives and a passion for delivering the best to our customers.
You will be joining a network of some of the most creative, innovative, and dedicated people in the industry with ample opportunities to learn and develop your career.
Our Associates are chosen for their attitude, skills, knowledge, and enthusiasm but above all, their belief that anything is possible.
Cognizant is an equal opportunities employer, and we welcome all applications regardless of race, colour, gender, ethnic origin, nationality, religion or beliefs, disability, age, sexual orientation, political opinions, or trade union membership.
Cognizant is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.
Network Security Engineer
Posted 1 day ago
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Meta's Network Security team is seeking an experienced engineer to help secure our global Data Centers, network Backbone, Optical Infrastructure, and Edge PoPs. We do this by working extensively across the Meta family of products, including Instagram, WhatsApp, and AI where we identify and solve security problems across network infrastructure. You will be responsible for building, implementing, and operationally supporting the organization to develop security controls and services that will protect network infrastructure which helps serve traffic for over 3 billion users worldwide. We are looking for engineers with experience in managing complex issues that require problem-solving to drive security and innovation, who will research and develop new solutions to help protect our infrastructure and our users through a defense in-depth approach. The team thrives in finding security issues and eradicating them and makes life hard for bad actors. With focuses that range from large scale Distributed Denial of Service (DDoS), routing security, security tool development, defense against internal and external attacks there's lots of room to push your skill set in deploying network security controls at scale.
**Required Skills:**
Network Security Engineer Responsibilities:
1. Identifying risks across network infrastructure that would lead to the exposure of sensitive data, unauthorized access, or loss of availability and prioritizing remediation efforts to address gaps
2. Influence security direction of the network, including management software and infrastructure to protect the network integrity of Meta platforms
3. Conceptualize and lead efforts towards building sustainable and scalable network layer security controls and tooling
4. Mentor and champion security practices through cross functional work with engineering teams throughout Meta
5. Keep Meta's safe through active operation and defense of critical network infrastructure
**Minimum Qualifications:**
Minimum Qualifications:
6. Engineering degree, or a related technical discipline, or equivalent work experience
7. Experience coding in higher-level languages (e.g. Python, Rust, Go, C++)
8. Experience in configuration and maintenance of network platforms such as firewalls, routers, switches, load balancers, and proxies
9. Experience learning software, frameworks and APIs
**Preferred Qualifications:**
Preferred Qualifications:
10. Understanding of implementation and scaling of access controls across both host and network layers.
11. Understanding of threat models to better protect against attacks or detect new vectors.
12. Experience leading network efforts to investigate, prevent, and mitigate security incidents.
13. Experience evaluating and testing new vendor platforms and in house network initiatives for security issues.
14. Experience leveraging layered security models to defend critical network infrastructure.
**Industry:** Internet
Network Security Engineer
Posted 4 days ago
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Network Security / Penetration Testing / CREST / CSTL / API Testing / Config Reviews / Infrastructure / Outside IR35 / West London
We’re seeking an experienced Network Security Engineer to support a major multi-phase security testing project. You’ll conduct penetration tests, configuration reviews, and infrastructure assessments, contributing to a high-profile programme of work extending into next year.
Required
- Strong background in network and infrastructure security.
- Experience performing penetration testing, configuration reviews, and API testing.
- Knowledge of “classic” CHECK-style testing methodologies.
- CREST, CSTL or CTL certification (Team Member or Team Leader level).
- Ability to deliver high-quality reports and communicate technical findings clearly.
- Hands-on experience across infrastructure, networking, and external testing.
- Experience working within CHECK or other accredited testing schemes.
- Strong understanding of secure network architecture and hardening practices.
- Previous consultancy or project-based testing experience.
- Outside IR35
- West London (on-site presence required for majority of testing)
- 0-hours contract – project-based work, phase by phase
- Initial phase focused on network testing, with further phases planned into next year
- Day Rate: Competitive
- Start: ASAP
- 1-Stage Interview Process with consultancy SME
Network Security / Penetration Testing / CREST / CSTL / CTL / API Testing / Config Reviews / Infrastructure / Outside IR35 / West London
Network Security Engineer
Posted today
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The ideal candidate will possess a strong understanding of network protocols, security best practices, and industry-standard security technologies. Proven experience in incident response, threat analysis, and developing security policies and procedures is essential. Certifications such as CISSP, CCNA Security, or equivalent are highly desirable. You will collaborate closely with IT teams to troubleshoot security issues, implement security patches, and ensure compliance with regulatory requirements. A proactive approach to identifying and mitigating potential security risks is crucial. Excellent analytical and problem-solving skills, coupled with strong communication abilities, will enable you to effectively convey technical information to both technical and non-technical stakeholders.
This is an excellent opportunity to join a reputable organisation and contribute to its cybersecurity posture. The role offers a competitive salary, comprehensive benefits, and the chance to work with a dedicated team. You will be instrumental in protecting sensitive information and maintaining the operational continuity of the business. This hybrid role offers a balance between in-office collaboration and remote flexibility, fostering a productive work environment.
Network Security Engineer
Posted 3 days ago
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Network Security Engineer
Posted 6 days ago
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Job Description
Responsibilities:
- Design, implement, and manage network security solutions, including firewalls, VPNs, intrusion detection/prevention systems (IDS/IPS), and endpoint security.
- Monitor network traffic for security breaches and suspicious activities, responding promptly to incidents.
- Conduct regular vulnerability assessments and penetration testing to identify and address security weaknesses.
- Develop and maintain security policies, procedures, and documentation.
- Collaborate with network operations teams to ensure secure network configurations and deployments.
- Stay current with the latest security threats, trends, and technologies, proactively recommending enhancements to security posture.
- Provide expert guidance on security best practices to internal stakeholders.
- Respond to and investigate security incidents, performing root cause analysis and implementing corrective actions.
- Manage security-related vendor relationships and evaluate new security products and technologies.
- Ensure compliance with relevant security standards and regulations.
- Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field.
- Minimum of 5 years of experience in network security engineering or a similar role.
- Strong understanding of TCP/IP, routing protocols (e.g., BGP, OSPF), and network architecture.
- Hands-on experience with security technologies such as firewalls (Palo Alto, Cisco ASA), VPNs, IDS/IPS, SIEM solutions.
- Knowledge of common cybersecurity frameworks (e.g., NIST, ISO 27001).
- Relevant certifications such as CISSP, CCNA Security, CCNP Security, or similar are highly desirable.
- Excellent problem-solving and analytical skills.
- Strong communication and interpersonal skills, with the ability to explain technical concepts to non-technical audiences.
- Ability to work effectively under pressure and manage multiple priorities.
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Network Security Engineer
Posted 6 days ago
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Job Description
- Designing, implementing, and managing network security solutions, including firewalls, Intrusion Detection/Prevention Systems (IDPS), VPNs, and access control systems.
- Monitoring network traffic for security breaches and suspicious activities.
- Responding to security incidents, performing forensic analysis, and implementing containment and eradication measures.
- Conducting vulnerability assessments and penetration testing.
- Developing and enforcing network security policies and procedures.
- Collaborating with IT teams to ensure network security is integrated into all aspects of infrastructure design and deployment.
- Staying up-to-date with the latest security threats, vulnerabilities, and technologies.
- Providing technical guidance and support on network security best practices.
- Participating in security awareness training for employees.
- Maintaining security documentation and incident logs.
Network Security Engineer
Posted 6 days ago
Job Viewed
Job Description
Key Responsibilities:
- Design, implement, and manage network security infrastructure, including firewalls, routers, switches, IDS/IPS, and VPNs.
- Monitor network traffic for security breaches and suspicious activities, utilizing SIEM tools and other security monitoring solutions.
- Perform regular vulnerability assessments and penetration testing to identify security risks.
- Develop and maintain security policies, standards, and procedures.
- Respond to and investigate security incidents, coordinating remediation efforts and providing post-incident analysis.
- Configure and maintain security systems, ensuring they are up-to-date with the latest patches and threat intelligence.
- Collaborate with IT teams to ensure security is integrated into all aspects of the network infrastructure.
- Provide technical guidance and support on security-related matters to colleagues.
- Stay informed about the latest security threats, trends, and technologies.
- Contribute to security awareness training for staff.
- Bachelor's degree in Computer Science, Information Security, or a related field, or equivalent practical experience.
- Minimum of 4 years of experience in network security engineering.
- Strong knowledge of TCP/IP, routing protocols (BGP, OSPF), and network security technologies (e.g., Palo Alto, Cisco ASA, Fortinet).
- Hands-on experience with IDS/IPS, SIEM solutions (e.g., Splunk, QRadar), and endpoint security tools.
- Familiarity with security frameworks and compliance standards (e.g., ISO 27001, NIST).
- Relevant security certifications such as CISSP, CCNA Security, or CompTIA Security+ are highly desirable.
- Excellent analytical and problem-solving skills.
- Strong communication and interpersonal skills, with the ability to explain complex technical issues to both technical and non-technical audiences.
- Ability to work effectively under pressure and manage multiple priorities.
- Must be able to work on-site in Bradford .
Network Security Engineer
Posted 6 days ago
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