- Co-founder of a credit card payment processor in Hong Kong since 2005
- Founder of an IT security consultation company in Hong Kong since 2003
- Co-founder of an Internet Service Provider (ISP) from 1994 to 2002
- CISSP Trainer since 1999
Co-founder of a credit card payment processor in Hong Kong since 2005 Founder of an IT security consultation company in Hong Kong since 2003 Co-founder of an Internet Service Provider (ISP) from 1994 to 2002 CISSP Trainer since 1999