Just a moment...
Are you sure you want to delete your reply beginning with '' ?
Are you sure you want to delete your Issue titled: '' ?
Technical qualification is not necessary for providing technical services. After rendering long services in PSU, a person may be technically sound enough to provide liaisoning services which itself is technical in nature. Non experienced persons is not supposed to engaged in such activity. Obviously if you have counter to this argument, the issue to be decided accordingly.
The nature of the work is not clear.
If he is engaged in business networking, or follow-up in various transactions, you should look at 'support services for business or commerce' or 'business auxiliary service', depending on what exactly is done.