Oliver advises a wide range of clients on all aspects of corporate law, with a focus on restructurings, joint ventures and public takeovers. He also has broad experience in advising clients on corporate governance and in corporate litigation cases.

His previous restructuring transactions include, inter alia, advising Midea on the squeeze-out of the minority shareholders of KUKA Aktiengesellschaft, of HomeAdvisor on the merger of MyHammer Holding AG, of Schneider Electric on the squeeze-out of the minority shareholders of RIB Software SE, and of LEG on the change of legal form to an SE. Oliver further advised Commerzbank AG in connection with the merger squeeze-out of the minority shareholders of comdirect bank Aktiengesellschaft, of KKR on the squeeze-out of the minority shareholders of GfK SE, MeVis Medical Solutions AG on the conclusion of a domination agreement with VMS Deutschland Holdings GmbH, Atlas Mara Ltd. on the squeeze-out of the minority shareholders of ADC African Development Corporation AG, GSW Immobilien AG on the conclusion of a domination agreement with Deutsche Wohnen AG, and Fresenius SE on the change of legal form into an SE & Co. KGaA.

In corporate litigation, Oliver advised, inter alia, HELIOS on the acquisition of shares in the district hospital Gotha/Ohrdruf, held by the District of Gotha and the City of Ohrdruf, and represented HELIOS Kreiskrankenhaus Gotha/Ohrdruf GmbH in a number of legal proceedings against the co-shareholders of HELIOS. Oliver also specializes in disputes in connection with shareholder meetings, such as shareholder claims, appraisal proceedings and special audits.

Previous public takeover transactions in which he has advised include, inter alia: PNE in connection with the takeover offer by Morgan Stanley Infrastructure Partners, Commerzbank AG on the purchase offer to the shareholders of comdirect bank Aktiengesellschaft, MeVis Medical Solutions AG in connection with the takeover by Varian Medical Systems, the supervisory board of Hawesko Holding AG in connection with the takeover by Tocos Beteiligung GmbH, Fresenius SE & Co. KGaA on the takeover offer to the shareholders of Rhön-Klinikum AG (2012), Rolls-Royce plc. on the takeover and the following integration of Tognum AG, and Demag Cranes AG in connection with the takeover by Terex.

Oliver teaches corporate law at the Goethe University of Frankfurt and has published several articles in this field of law.