Answer:
Mr Hoa is an agile and active person who has extensive relationships with customers and event organizers. This guy is the one to choose. He has all what is needed to be the of head of customer relations.
Lam specializes in visual and decorative sound. This is the core cox value of the company. Yeah, but he has no experience with relationships with customers. He should be Mr Hoa's right hand because he has the technical skills, but not the head of customer relations.