Freelance Network Security Engineer

In this role, you will be instrumental in designing, implementing, and maintaining advanced security solutions that reinforce our security posture. Leveraging your hands‑on experience with Zero Trust principles and segmentation technologies, you will help shape resilient network architectures that protect against evolving threats and unauthorized access.

Key Responsibilities

Zero Trust Strategy & Implementation

• Collaborate with cross‑functional stakeholders to assess business and security requirements and define tailored Zero Trust strategies.
• Design, build, and implement Zero Trust architectures aligned with industry best practices and organizational goals.
• Develop granular access control mechanisms rooted in Zero Trust principles.

Network Segmentation & Infrastructure Security

• Deploy, configure, and optimize network segmentation and micro‑segmentation solutions to restrict lateral movement and enhance access governance.
• Integrate and support segmentation platforms such as Cisco Secure Workload, VMware NSX, Illumio, Guardicore, Cisco ACI, or equivalent technologies.

Security Assessment & Risk Management

• Conduct comprehensive security assessments, including network risk analysis, segmentation gap reviews, and threat modelling.
• Identify vulnerabilities and propose pragmatic mitigation strategies to strengthen overall security posture.

Documentation & Governance

• Produce and maintain detailed security documentation, including:
• Solution Design Documents (SDDs)
• Network and security architectural diagrams
• Policies, standards, and operating procedures
• Ensure alignment with compliance frameworks and internal governance guidelines.

Technical Leadership & Knowledge Sharing

• Provide technical mentorship to junior engineers, enabling skill growth in Zero Trust concepts, network segmentation, and security‑focused engineering practices.
• Stay current with emerging security threats, industry innovations, and evolving standards related to Zero Trust and micro‑segmentation.

Skills & Experience Requirements

Minimum 5 years of experience as Network Security Engineer

Technical Expertise

• Demonstrated experience designing and implementing Zero Trust architectures in enterprise environments.
• Strong hands‑on experience with network segmentation/micro‑segmentation technologies such as:
• Cisco Secure Workload / Tetration
• VMware NSX
• Illumio
• Guardicore / Akamai
• Cisco ACI
• Strong understanding of:
• Network protocols (TCP/IP, DNS, DHCP, TLS, etc.)
• Firewall technologies and policies
• Identity‑based access controls

Security & Compliance Knowledge

• Familiarity with major security frameworks and regulations, including:
• NIST Cybersecurity Framework
• CIS Controls
• GDPR, HIPAA, or similar regulatory requirements

Soft Skills

• Excellent analytical and problem‑solving abilities when addressing complex security challenges.
• Effective communication skills, including the ability to explain technical concepts to non‑technical stakeholders.
• Strong collaboration skills and the ability to work in multi‑disciplinary teams.