Mark Summers

Maurus Winzap is a partner and heads the Tax Team. Maurus' practice covers all areas of domestic and international corporate taxation. He acts for a broad range of corporate and financial clients, and has developed significant expertise in planning and advising on M&A and private equity transactions, structured financings, corporate restructurings, relocations, capital market transactions, collective investment schemes and management incentive programs. Furthermore, he focuses on advice t...

Irène Suter-Sieber is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Irène, who practices law in Zürich, Switzerland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Irène is held by other top lawyers in the same geographic and legal practice area.

Dieter Hofmann heads the Litigation & Arbitration Team. His primary focus is dispute resolution in complex, mainly international cases, ranging from pre-litigation advice, representation of clients in court and in arbitration proceedings, coordination in cases involving multiple jurisdictions, enforcement of foreign judgments and arbitral awards and international legal assistance. He also sits as arbitrator in international arbitrations. Dieter Hofmann has considerable experience in compl...

Partner Certified Specialist SBA Inheritance Law Tobias Somary heads the private client team of the firm. He specialises in the area of estate and succession planning, prenuptial agreements, estate administration, inheritance disputes, foundations & trusts, charities, art, private banking laws, and in- and outbound relocation. After having worked with a large Zurich law firm (Baer & Karrer) in 1998 and 1999, Tobias Somary joined CMS in 2000. In 2004 he completed post-graduate studies ...

Partner Stephan Werlen focuses on M&A and corporate law, joint ventures, MBOs, acquisition finance, venture capital transactions, corporate restructuring and corporate relocation. He has broad experience both in domestic and international mergers and acquisitions (including auction processes) and the financing of such transactions. In addition, he is an expert in W&I insurance transactions (M&A insurance) with a long track record in this area. Stephan Werlen also regularly advises...

Urs P. Gnos heads the Transaction Team. His practice focuses on international and domestic mergers & acquisitions, private equity, venture capital and capital market transactions, commercial and corporate law as well as public tender offers and buy-outs. Urs P. Gnos also advises companies with respect to corporate governance matters, stock exchange regulations, corporate reorganizations and restructurings, incl. relocations. Urs P. Gnos is a member of various board of directors, among oth...

Counsel Simone Brauchbar Birkhäuser advises and represents clients in connection with contentious and non-contentious issues relating to trademarks, designs, copyrights, patents, data protection, unfair competition and advertisement. She has substantial experience in the drafting and enforcement of contracts for the transfer of intellectual property rights, especially license agreements. She further regularly deals with all due diligence relevant IP/IT and data protection aspects of corp...

Niklaus Zaugg specialises in contract law, litigation and arbitration. He advises clients in a wide range of commercial disputes, including banking disputes, and he represents their interests both before domestic courts and international arbitral tribunals. Niklaus Zaugg has been practicing as a lawyer since 2008. His clients include Swiss financial institutions and active, listed multinational industrial companies. Niklaus Zaugg studied at the Universities of Geneva and Zurich and received h...

Partner Dr Patrick Sommer is Co-Head of the CMS Competition & EU Group. In this position, he jointly leads an international team of more than 170 competition lawyers. Patrick Sommer focuses on competition law, corporate law and M&A. Patrick Sommer has graduated from the University of St.Gallen in 1987 and was admitted to the bar in 1989. He has written his doctoral thesis on the relationship of Switzerland to the European Union and completed postgraduate studies at the Collège ...

Partner Dirk Spacek is partner and in charge of the practice groups TMC and IP. He primarily deals with new business models arising in the media-, internet- and technology(IT)-sector, data protection and intellectual property law. Dirk Spacek mainly advises clients from the media, technology, industry and financial services sectors on technology-related legal matters, in particular IT-contract law, outsourcing, data protection, Internet of Things (IoT), patent research and compatibility coope...