Trusted Security Advisers Register

287 Information Security Professionals have joined TSAR already! ...And we're still growing fast!

Navigation through the listings is straightforward - simply scroll down and browse, or use the fixed menu on the right to filter by credential type, and then click on a Professional's name to see more information about him/her. If you have any comments or suggestions, please contact me.

Important: By accessing these listings, you agree that you have read and accepted my disclaimer.


Mark Sowerby, Independent
CLAS [CESG] from 2003-10-01 to 2013-09-30 (Expired)
CCP [IISP] Security & Information Risk Advisor Practitioner from 2012-11-13 to 2015-11-13 (Expired)
CCP [IISP] Security & Information Risk Advisor Practitioner from 2015-06-12 to 2018-06-12 (Expired)
CISSP [(ISC)²] Certified Information Systems Security Professional from 2001-07-21 to 2025-07-31
ISSAP [(ISC)²] CISSP Security Architecture Concentration from 2004-11-11 to 2025-10-31
MCIIS [IISP] Full Member of CIISec from 2009-04-01 to 2016-03-31 (Expired)
ISO27001 [BSI] ISMS Lead Auditor from 2011-12-09
MSc [University of London] Information Security Masters Degree from 2007-11-01
QSA [PCI-SSC] Qualified Security Assessor from 2015-06-08 to 2016-06-07 (Expired)