He has acted as party counsel in more than one hundred international arbitrations, in particular in proceedings relating to mergers and acquisitions, long-term supply contracts, distribution contracts and joint ventures. Balz Gross also acts as co-arbitrator and sole arbitrator in numerous international arbitrations.

Balz Gross has acted as counsel in numerous large, mostly international proceedings before the state courts in all Swiss cantons, in particular the Commercial Courts and the High Courts and Supreme Court, and represents foreign and Swiss clients in proceedings involving criminal law issues. Balz Gross also advises on employment litigation, with a particular focus on executive remuneration and employee incentive schemes, and advises clients on employment issues in connection with restructurings.

«Leading litigator and arbitration counsel» (Chambers 2010), «exceptional practitioner» (The Legal 500, 2023), «quick witted and prudent» (Chambers 2011),«Forceful litigator» (Chambers 2019), Balz Gross is constantly recommended in Chambers in Dispute Resolution (Arbitration Counsel, Band 1; Litigation, Band 1) and Employment (Band 2), in Benchmark Litigation (Lawyer of the Year 2019) and The Legal 500 in Dispute Resolution (Arbitration, Hall of Fame; Litigation, Leading Individual) and Employment (Leading Individual).