When designing your CV you should put yourself in the shoes of the person who will be reading it. Why should they pick your CV over others? What makes yours stand out?
For the person reading your CV the most useful information is not where you worked or for how long, but rather what you achieved while you were there.
The question they will be asking themselves is: What could this person offer our company?
Instead of forcing the reader to guess what achievements you might be capable of given your skill set, show them.
By focusing on the benefits you've brought to your previous employers you immediately give the person reading your CV a reason to call you in for an interview.
Staff Training is a soft skills training provider.