Hi, Gregory. This is Jang returning your call. I got your message. You said that you want to know how to train your new Employees and also wonder how your senior sales people can teach them. Is it right? ("Is that right?" might sound more natural here) Here are my suggestions for you. You can put a senior sales person with a new employee one by one, so each one of the new employees (when you use the expression "one of," the object should always be used with a determiner, as in "one of my friends") can learn skills very quickly. And why don’t you make a book about knowledge and ways of selling a product efficiently and then give it to new employees. I think it is a good idea to help them understand their job better. It is all I suggest. If you have any question, please call me again. Thank you.