If Dr. Alfred Lanning is the brains behind US Robot and Mechanical Men, Inc., then Lawrence Robertson is the… uh… well, it's not clear what he is. He's certainly the founder of the company (Introduction.2) and he may have invented (or helped to invent) the positronic brain (Introduction.6). But in all of these stories, he's just the president of the company.
In fact, he's so unimportant to these stories that it took us a while to realize that the "Robertson" who is in charge of the company in "Escape!" is actually the son of the original Robertson (Escape.7). Which makes it seem like it's better to be a scientist in an Asimov story than it is to run a company.