Establishment and functioning of a corporate office requires a lot of verification, paper work, authentication and legalisation. For conducting the same by abiding the business laws in a certain country, legal help is required and so corporate litigation lawyer is needed by the business. After the establishment, there are certain norms that need to be followed by the organization. Those could be regarding share-holders, acquisitions, partnerships, internal discipline etc. So, in those cases also, the lawyers are contacted for seeking advice and support.
Many organizations form their own legal advisory committees that take care of all the corporate legalities internally and externally.