Jonas is a trusted advisor to a range of clients, including listed companies, multinationals and sovereign wealth funds, providing expert guidance on their high-profile M&A transactions and related capital markets law. His advice spans across established industries, showcasing a robust presence in the transport, logistics, infrastructure and retail sectors.

He has also a distinct focus on German Stock Corporation Law, providing counsel to executive and supervisory boards of listed companies, especially in relation to business judgment decisions, remuneration and controversial shareholders' meetings. He chairs public shareholders’ meetings for clients and is one of Germany's few experts in handling complex court valuation proceedings (Spruchverfahren) following takeovers and structural measures like squeeze-outs.