<p>You're not totally incorrect, however. You are right that your brother works in corporate finance. However, he works in-house at a company. The bread and butter of i-banks like Goldman and the like is also corporate finance. The only difference is that they charge a fee and work with clients on a case-by-case, company-by-company basis.</p>
<p>There's probably very little difference in the actual job duties, though.</p>