GESSEL Attorneys at law | 9,459 followers on LinkedIn. Art of effectiveness | GESSEL is one of the leading law firms in the Polish market. It offers integrated legal services covering all fields and areas of specialisation in law. Thanks to its excellent knowledge of the legal and market environment, the firm has earned high recognition as an expert in the area of mergers and acquisitions, in particular in private equity and venture capital transactions, in the area of equity markets law, competition law and companies law.