MIT does not subscribe to any sources of organizational charts.
Companies tend to guard their organizational structures closely and typically do not publish them. Organizational charts sold on the web or published in books are frequently outdated or misleading.
In some cases, it is possible to piece together this information using various resources such as:
the company's website to follow press releases that announce new personnel or changes in key positions.
searching news databases such as Factiva to find articles about new officers and personnel or changes in positions.
looking up a company's annual report or 10K filing to identify major corporate segments or operational units.