The staff who attended the training course

[Winwin2011]

The staff who attended the training course, shared the knowledge that he learned from the course with his colleagues.

Is the above sentee natural?

 

[Raymott]

The staff member who attended the training course shared the knowledge that he learned from the course with his colleagues.

We don't use 'staff' for a single person. The sentence would be right if you changed all the pronouns to plurals - then you could use 'staff'. We don't put a comma between the subject and the verb (even though it might be tempting with a long subject).
There is still ambiguity about whether the staff member shared the knowledge with his colleagues, or was on the course with his colleagues, but the former is more likely.

 

[Winwin2011]

We don't use 'staff' for a single person. The sentence would be right if you changed all the pronouns to plurals - then you could use 'staff'. We don't put a comma between the subject and the verb (even though it might be tempting with a long subject).
There is still ambiguity about whether the staff member shared the knowledge with his colleagues, or was on the course with his colleagues, but the former is more likely.

Thank Raymott

Pleas correct the following sentences if they are not natural.


1. The staff member who attended the training course shared the knowledge that he learned from the course with his colleagues that did not attend the course.

2. The staff member who attended the traiing course shared the knowledge that he learned from the course with his colleagues that attended the course.

 

[Raymott]

The original would be OK. A native speaker might change it, but it's not likely to be read wrongly.

You don't need to write "the course" three times in one sentence. The following is good.
1. The staff member who attended the training course shared the knowledge that he learned [STRIKE]from the course[/STRIKE] with his colleagues that did not attend (or 'who could not attend') [STRIKE]the course[/STRIKE].