Qualification and resumes generally only speak to a persons ability to perform critical tasks and job specific functions, what happens when those all look great on paper and the candidate is definitely suited for the position however has no soft skills or ability to communicate within a collaborative environment. Communication and the ability to positively influence and inspire team members, showing resilience yet being flexible and taking responsibility are all hallmarks of the Soft Skills necessary for Great Leadership. When leaders have the ability to speak to the very hearts of their team and consistently demonstrate their appreciation that's when they become great because even when mistakes are made the team doesn't implode or fragment, it becomes stronger! 
Price-On-Application (dependant on project size.)