Member Companies in the UK

Penetration Testing Cyber Security
Incident Response
STAR (Simulated Target Attack & Response) Penetration Testing CBEST Approved Penetration Testing Provider STAR Threat Intelligence CBEST Approved Threat Intelligence Provider Cyber Essentials
2-sec Ltd
7Safe Ltd
Ambersail Ltd
A&O Corsaire Ltd  
BAE Systems Applied Intelligence
BSI Group
BT Security  ✓  ✓
CGI IT UK Ltd
Cigital Ltd  ✓
Cisco International Ltd
CNS Hut 3
Cognosec Ltd  ✓
Commissum
Context Information Security Ltd  ✓
Control Risks Group Ltd
Cyberis Ltd
Deloitte LLP
Digital Assurance Consulting Ltd  
Digital Shadows Ltd
Dionach Ltd
ECSC Ltd
Ernst & Young LLP
Espion Group  
Falanx Cyber Defence
First Base Technologies LLP
Gotham Digital Science  ✓   ✓
Hedgehog Security
Hewlett Packard Enterprise Information Security UK Ltd ✓ 
IBM United Kingdom Ltd
Info-Assure Ltd  ✓  ✓
Information Risk Management Ltd
Integrity SA
Integrity360
InteliSecure Ltd
IT Governance Ltd
JUMPSEC Ltd
KPMG LLP  ✓
MDSec Consulting  ✓
MTI Technology Ltd  
MWR Infosecurity Ltd  ✓
NCC Group  ✓  ✓  ✓
Nettitude Ltd
NTA Monitor Ltd
NTT Com Security (UK) Ltd
Obrela Security Industries
Pentest Ltd
Pen Test Partners LLP  ✓
Perspective Risk Ltd
PGI Strontium Ltd  ✓
Portcullis Computer Security Ltd
ProCheckUp Ltd  ✓
PwC  ✓  ✓
QinetiQ Ltd
Rapid7 Inc
Redscan Ltd
SEC-1 Ltd  
SECFORCE Ltd  ✓  
SecureWorks
Security Alliance Ltd  ✓
ServerChoice Ltd
SpiderLabs (Trustwave)
SureCloud Ltd  ✓  ✓
Symantec Ltd  ✓
Verisign iDefense
Verizon UK Ltd  ✓
Westpoint Ltd