Two halves of the same file
Corporate work is the structural side, meaning forming and maintaining entities, ownership and governance, investments, acquisitions and sales, and financing. Commercial work is the operating side, meaning the agreements a business signs to buy, sell, license, lease, and hire, along with the disagreements that come out of them. In practice the two are tied together: a dispute with a distributor is read against an agreement someone negotiated three years earlier, and an acquisition is priced partly on the contracts the target is carrying. A firm that has seen both halves does not have to be brought up to speed twice.
What the engagement usually covers
For most companies the ongoing work is steady rather than dramatic: contract review and negotiation, corporate housekeeping and records, employment and policy questions, occasional transactions, and the handful of disputes that arise in a year. Companies often split this across several providers and discover the gaps only when something falls between them, such as a renewal nobody tracked or a term negotiated in one agreement that contradicts another. It is worth deciding deliberately what a single firm handles, what goes to counsel focused on a particular area, and what stays inside the company. How often each kind of work actually comes up is usually what settles that question.
Choosing and starting
Ask how a firm staffs its matters, who you will actually speak with week to week, how it handles a conflict that arises later, and how it reports on cost. Bring your governing documents, the contract templates the business runs on, the list of places you operate, and anything sitting open right now. If prior counsel holds files, arrange the transfer at the start rather than when a deadline appears. Tell us where the business is heading over the next year or so, since that changes what is worth putting in place now.