Sargent & Lundy company is a 125- year-old firm providing comprehensive engineering, project management, and consulting services for complex power generation and power transmission projects, located in multiple cities and countries. It had faced a problem that a significant portion of employees were retiring in five years. To continue its business expertise, it hired many new employees. Now, they had to find ways to transfer existing expert knowledges to the new people. Provide two or three ways to transfer the expert knowledge to the new employees effectively.