Based in Basel, Testaris AG has three partners and nine members of staff.

The firm offers audit, advisory, accounting, tax, company administration, and M&A services for both national and international clients across a range of sectors.

Testaris AG partner Andrea Bianchi said: “As a firm whose partners have decades of international experience, we know the advantages of being part of a strong global network. We are aware of Nexia International's excellent reputation and welcome the opportunity to work with our peers to help our clients achieve their ambitions.”

Nexia International CEO Kevin Arnold said: “We are delighted to welcome Testaris AG to our network and look forward to working with them. They give our members even more access to extensive international expertise in Europe and across the world.”