I suppose you object to the phrase "Men who do nothing but think"? While sexism might have been prevalent in most companies during the time of this ad by modern standards, this phrase is not necessarily sexist. Sure, if you'd publish this ad today the silhouette would depict a woman and the text would be different, but "men" can be used in a gender neutral way [1] as in "All men are created equal". Take it as an artifact from a different time and don't read too much into it.

[1]: http://en.wikipedia.org/wiki/Gender-neutral_pronoun#Historic...