It is almost impossible to have each and every skill required in a job description. In the job descriptions with BC Hydro, you will see sections that say "Qualifications" and another section that says "The following are considered assets." Know that most of the time qualifications are ranked from most important to least in a job description. The "assets" are going to be those nice-to-have skills that are not necessarily required but might give you a leg up in being considered for the role. If you don't meet all of the criteria for the role in either category, explain ways you have gone outside that box to gain the knowledge or skills they are looking for.