Clemens advises both companies as well as investors on national and international M&A transactions. He has a strong focus on transactions involving innovative and high-growth technology companies. This especially includes venture capital and growth financings of these companies as well as the preparation and implementation of successful exit transactions. In addition, he provides comprehensive advice on the design and implementation of employee and management participation programs.

Recent examples of Clemens' venture capital work are Accel's investments in Celonis, Tencent's investments in Scalable Capital, N26 and Lilium, and SE Ventures' investment in Ostrom, as well CMBlu's and ottonova's respective financing rounds. In addition, he advised the French fintech Qonto on the acquisition of its German competitor Penta, as well as the shareholders of the sales intelligence startup Echobot on its merger with Leadfeeder and the simultaneous investment by Great Hill Partners.

In private equity, Clemens most recently advised Silver Lake on its public takeover of Software AG, as well as LANXESS on a joint venture with Advent for high-performance engineering materials.