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Network Security Engineer- Heathrow

Vallum Associates
Windsor
2 weeks ago
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This job is provided by Vallum Associates. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

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Location:Heathrow, UK (4 days from office weekly)

Contract:6+ Months

Pay:400 GBP/day Inside IR35

Job Description

We are seeking a Network Security Engineer with expertise in identifying, prioritizing, and remediating network vulnerabilities, including zero-day threats.

  • Require a strong security mindset and hands-on experience in securing hybrid infrastructure, including on-premises, cloud, and SD-WAN environments.
  • Analyze vulnerability reports from tools such as Tenable, Qualys, AWS Inspector, and implement corrective actions.
  • Remediate common network issues like IP spoofing, default credentials, open ports, unencrypted protocols, and missing firmware patches.
  • Be familiar with insecure legacy protocols like Telnet and SNMPv1 and enforce secure alternatives such as SSH and SNMPv3.
  • Apply hardening techniques using CIS Benchmarks, NIST standards, and industry best practices across firewalls, routers, and switches.
  • Configure and maintain network security controls including ACLs, VLANs, DMZs, and micro-segmentation.
  • Ensure management interfaces for network equipment follow least-privilege principles and are protected with strong encryption like TLS 1.2 or 1.3.
  • Have a deep understanding of cloud networking components including AWS VPCs, Azure NSGs, and GCP firewall rules.
  • Design and enforce segmentation and egress control in cloud and hybrid environments to reduce lateral movement risks.
  • Support security incident response by investigating and remediating network-level threats and anomalies.
  • Collaborate with penetration testers and vulnerability scanning teams to validate vulnerabilities and verify fixes.
  • Work with GRC and compliance teams to align network configurations with frameworks like PCI-DSS, ISO 27001, etc.

Preferred Certifications:CCNP Security, CISSP, AWS Security Specialty, OSCP, or CEH. Scripting experience is a bonus.

Contact:Senior Delivery Consultant

Phone:

Email:

Additional Details

  • Seniority level: Mid-Senior level
  • Employment type: Contract
  • Industry: Airlines and Aviation

Referrals can increase your chances of interviewing at Vallum Associates by 2x.

Location: Greater London, England, United Kingdom

Posted: 4 months ago


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