Security control assurance specialist

Company: Colt Telecom
Apply for the Security control assurance specialist
Location: London
Job Description:

Overview

In this role you will validate design, implementation, and ongoing effectiveness of security controls across Colt to mitigate risk and meet regulatory requirements. You will work with cross-functional teams to test, monitor, and improve controls, aligning with global frameworks. You’ll act as a key partner for audits and regulatory initiatives, translating technical controls into business risk. You’ll join a diverse, growth-focused security community that values proactive, detail-oriented problem solving and steady impact.

Pay / Benefits

  • Flexible working hours and the option to work from home
  • Extensive induction program with mentors
  • Opportunities for further development
  • Global Family Leave Policy
  • Employee Assistance Program
  • Inclusion & diversity networks

Responsibilities

  • Plan and execute control assurance activities including testing and validation of security controls
  • Develop and maintain control testing methodologies, scripts, and procedures
  • Perform periodic and continuous control monitoring for ongoing effectiveness
  • Identify control gaps and areas for improvement
  • Assess controls against ISO 27001, NIST CSF, CIS Controls, SOC 2, NIS2
  • Support regulatory and internal compliance initiatives
  • Act as a point of contact for audits and provide evidence and walkthroughs
  • Document testing results, findings, and risk implications
  • Produce assurance reports for management and stakeholders
  • Maintain control inventories and assurance documentation
  • Collaborate with IT, security engineering, and business teams to assess controls
  • Support remediation planning and execution

Key requirements

  • 3–6+ years in information security, IT audit, or GRC
  • Proven experience with security control testing and assurance
  • Strong knowledge of ISO 27001/27002, NIST CSF/800-53, SOC 2/ISAE 3402, CIS Controls
  • Analytical thinking
  • Strong communication and stakeholder management
  • Attention to detail
  • Security control testing and assurance
  • Regulatory and framework mapping (ISO 27001, NIST, SOC 2, CIS)
  • GRC concepts and processes

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Posted: October 10th, 2026