If I understand your question correctly, you are asking about ways in which men who are already employed by a business corporation are presently constrained (i.e., restricted, bound, held back, confined) by male stereotypes in specific (though unnamed) corporations. I can speak about this in two corporations in the securities industry.
Men are constrained by male stereotypes in corporations in this industry in that if they do not objectify women who work in the industry with them (from transaction clerks to assistants to female brokers to female agents), they are not afforded the respect and reputation other men attain. Men are also constrained by stereotype if they don't aggressively and single-mindedly, to the exclusion of courtesy and civility, pursue their objective of selling securities and building a massive client base. Without single-mindedness and drive, they are considered of inferior character and worthiness.
Aggressiveness is a key and highly valued trait in the securities industry. Men who don't model this trait in all facets--transactions, client associations, personal conversation, deportment, automobile choices, etc--are not given the credence others are. As a result, men may feel out of place, inadequate, unhappy (even if their job performance is high), and ostracized. Some can withstand and make top careers for themselves, gaining the private office with the window (where they have some protection from the opinions of others), yet many more let their discomfort and unhappiness with the environment steer them into other careers, even if that means getting more schooling.