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NAC EngineerXcede • England, GB
NAC Engineer

NAC Engineer

Xcede • England, GB
30+ days ago
Job type
  • Temporary
Job description

Contract Network Security Engineer (NAC Specialist)

Location: City of London (3–4 days per week on‑site)
Contract Length: Initial 3 months
Rate: £500–£600 per day (Inside IR35)

We are working with a leading global IT services provider on a contract engagement supporting a large, highly regulated financial services organisation in the City of London. The engagement focuses on a Network Access Control (NAC) policy cleanup and remediation programme, aligning access controls to least privilege, zero trust, and vendor best practices. This role requires a senior, hands‑on Network Security Engineer with deep NAC expertise who can operate confidently across security engineering and network operations teams.

Key Responsibilities

  • Review and remediate existing NAC exception policies to ensure alignment with organisational standards and vendor best practices.
  • Identify and remove overly permissive or misaligned access exceptions, including inappropriate MAC‑based policies.
  • Enforce deny‑by‑default, allow‑list access models using identity, device type, and posture.
  • Implement and refine device profiling and posture validation rules.
  • Improve role‑based access control and dynamic policy enforcement (e.g., VLAN assignment).
  • Perform gap analysis against NAC vendor best practices.
  • Collaborate closely with Security Engineering and Network Operations teams during remediation.
  • Ensure changes follow formal change control processes.
  • Produce clear documentation including
    • NAC exception audit reports (pre‑ and post‑remediation).
    • Updated access control matrices.
    • Final remediation and validation summaries.
    • Executive‑level summaries for stakeholders.

Required Skills & Experience

  • Strong hands‑on experience with enterprise Network Access Control (NAC) solutions such as Cisco ISE, Aruba ClearPass, Forescout, FortiNAC.
  • Deep knowledge of 802.1X, RADIUS / TACACS+, device profiling and posture assessment, identity‑based access control (user + device), least privilege and Zero Trust principles.
  • Experience remediating NAC environments with large numbers of legacy or overly permissive exceptions.
  • Strong enterprise networking background (switching, VLANs, campus networks).
  • Ability to work effectively in regulated, security‑conscious environments.
  • Comfortable producing technical documentation and engaging with senior stakeholders.

Desirable Experience

  • Financial services or other highly regulated industries.
  • Certificate‑based authentication / PKI.
  • Integration with directory services (e.g. AD / Azure AD).
  • Logging, alerting, and SIEM integration.
  • Previous NAC redesign or cleanup engagements.

Working Arrangements

  • 3–4 days per week on‑site in the City of London.
  • Initial 3‑month contract with potential extension.
  • £500–£600 per day, Inside IR35.

Seniority level

  • Not Applicable

Employment type

  • Contract

Job function

  • Consulting

Industries

  • Professional Services
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NAC Engineer • England, GB

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