I believe the answer is: communication, negotiation, critical reasoning, and interpersonal skills.
Communication granted them with the ability to unite various individuals that are crucial for the organization goals. Negotiations granted them with the ability to always seek the best possible deals for the organization.
Critical reasoning granted them the ability to analyze a problem with sound logic to create the best decision,
Interpersonal skills granted them with the ability to make the employers and clients feel comfortable in interacting with them.