·         EDP Officer of Jan Sin Mee (Holdings) Ltd -- a stock-listed company in Hong Kong

o    Departmental Administration

o    Systems Development

o    User Training

·        EDP Manager of C & K Components (HK) Ltd -- a stock-listed company in United States

o    Departmental Management

o    Systems Development

o    Management Training

·        EDP Manager of Luks Industrial Co Ltd -- a stock-listed company in Hong Kong

o    Departmental Management

o    Systems Development

o    Management Training

·        Systems Manager of Deluxe Computer Consultants -- a prestigious local consultancy company

o    Project Management

o    Internal Training

o    Customer Support

o    Presentation

·        Co-Founder & General Manager of an IT company  -- a local IT company with many big customers like HKTDC, Pfizer

o    Corporate Management

o    Internal Training

o    Presentation

·        Instructor II of City University of HK

o     Course Materials Preparation

o    Teaching

o     Students Counseling

·        Instructor I of City University of HK

o    Course Materials Preparation

o    Teaching

o    Students Counseling

·         Part-time Tutor of Open University of Hong Kong

o    Teaching

o    Students Counseling

·        Module Leader of SCOPE / Staffordshire University

·         Information Systems Engineering consultancy for many large & small corporations including Trade Development Council, Pfizer Corporation, Universal Optical Industries, etc.

·         Information Systems Security & Audit consultancy for many small-medium enterprises

·         A survey research project for Vogel Laundry Ltd (a subsidiary of Cathay Pacific) to calculate the impact of loss to their franchisee

·         A survey research project for PayPal (a subsidiary of eBay.com) to study the netizens' behaviour and awareness in their online activities

·         A survey research project for Internet Society (Hong Kong) to study IPv6 adoption in Hong Kong