Some attorneys work as employees of the companies they serve. Large corporations tend to employ their own team of attorneys. The word for these types of business lawyers is in-house counsel. They help their companies with all aspects of business law as the company’s needs might require.
Other business lawyers run their own law firms. They exist to serve businesses that may not be large enough to have their own in-house legal team. A law firm might also serve businesses in a niche area of business law. For example, a law firm might exist to help businesses only with intellectual property needs. Another firm might help a business set up a corporate entity and file the appropriate documents with the state.