Resillion

Resillion

Speciality: Adaptive Penetration Testing

London, United Kingdom 460 employees
[01] About

UK-based IT services and consulting company specializing in quality engineering, cyber security, and media content; offers penetration testing services confirmed by NCSC CHECK certification, with 300 employees (+13.8% YoY growth), $25.4M annual revenue, and offices across North America, Europe, and Asia.

At Resillion, we're more than just a global leader in quality engineering, testing, and cyber security – we're your dedicated partner from the start of your project to its successful launch. With 700+ experts and offices across North America, Europe, and Asia, we offer end-to-end digital testing services, covering quality engineering, media content, cyber security, and data protection. Our commitment to success, cutting-edge technology, and quality makes us a strategic partner for leading brands. Independently audited to global standards, Resillion holds NCSC Assured Service Provider status, CREST STAR, CREST SOC, and features an ISO17025 certified Digital Forensics and Cyber Incident Response lab.
[02] Services
Quality Engineering
Managed Testing Services
Penetration Testing
Cyber Security Consulting
Digital Forensics
Conformance And Interoperability Testing
Media Content Quality Control.
[03] Certifications
CREST

CREST Cybersecurity Certification


Origin


CREST (Council of Registered Ethical Security Testers) was established in 2006 in the United Kingdom by a group of cybersecurity professionals and industry representatives. It was created to address the growing need for standardized, recognized qualifications in penetration testing and cybersecurity services. The organization emerged from concerns about the quality and professionalism of security testing services, aiming to provide a framework that would certify both individual practitioners and the companies that employ them.


Industry Value


CREST certifications are highly valued in the cybersecurity industry because they demonstrate a practitioner's technical competence and adherence to professional ethical standards. Many government agencies, financial institutions, and large corporations specifically require CREST-certified professionals when procuring penetration testing or security assessment services. The certification provides assurance to employers and clients that certified individuals have been independently verified to possess the necessary skills and knowledge, and that they follow established codes of conduct. This makes CREST credentials particularly important for cybersecurity professionals working in regulated industries or seeking to work with organizations that have stringent security requirements.

CHECK

CHECK Certification


The CHECK (CHecklist Evaluating Computers and Key security) scheme was established by CESG (the UK government's National Technical Authority for Information Assurance, now part of the National Cyber Security Centre) in 1997. It was created to provide a structured framework for conducting information technology security assessments and penetration testing within UK government and critical national infrastructure environments. The scheme was designed to ensure that individuals performing security testing on sensitive systems possessed verified skills and adhered to established standards and methodologies.


The CHECK certification is highly valued because it represents government-endorsed validation of a security professional's ability to conduct rigorous, methodical security assessments. Organizations handling sensitive government data or operating within critical national infrastructure sectors often require CHECK-certified testers to ensure compliance with UK security standards. The certification's importance stems from its strict vetting process, which includes security clearance requirements and demonstration of technical competency, making CHECK holders trusted to access and test sensitive systems where standard commercial certifications may not suffice.

[05] Notable Clients
  • Vodafone
  • Orange
  • Niko
  • Becker Harman
  • Zephyr
  • Telenet
  • Slimming World
  • Showtime
  • Hulu
  • Heineken
  • Aggreko