As of my last update in October 2023, I don't have any specific information about an individual named Marshall Hamburger. It's possible that he is a private individual or a public figure not widely recognized in prominent news sources or public databases up to that time. If Marshall Hamburger is a fictional character or a recent public figure, I might not have that data. For an accurate biography, you might consider checking more recent sources or specific databases related to his field of influence.