Charles worked in the Department for Business, Innovation and Skills of the United Kingdom Government for twelve years, and is a Professional Electronic Engineer. He previously was Head of Security for the UK mobile operator one2one, and worked within British Telecom for twenty years before that, in the last few years in the Chairman's Office.
He has worked in many security areas over the last 40 years, including Cryptographic systems, secure designs, policies, auditing, and mobile radio for over 30 years. He now runs his own Company Zeata Security Ltd and is a Director of Azenby.
He has been Chairman on the GSM Association Security Group for 25 years. He has been working within GSM and 3GPP security standards, first chairing the Algorithm Expert Group way back in 1986. He is also Chairman of ETSI TC CYBER and was on the Permanent Stakeholders group of ENISA, The European Network and Information Security Agency.
