ADB Altorfer Duss & Beilstein’s tax team grows

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


ADB Altorfer Duss & Beilstein’s tax team grows

ADB Altorfer Duss & Beilstein in Zurich has promoted Fabian Streule to director of the firm’s tax department, as well as hiring two new partners, Marc Dietschi and Helen Spiegel.

On January 1 2016, Streule took on a director’s role. He advises on national and international tax matters, along with a special focus on Swiss-German cross-border issues. Before joining ADB, he worked as a tax consultant for PwC in Basle.

As per February 1 2016, Dietsci joined ADB from EY, where he worked in the international tax services and transfer pricing department. Before moving to EY, Dietchi was a senior manager at Hiliti.

He advises on international corporate tax with a particular focus on transfer pricing, international tax planning and supply chain management.

From April 1 2016, Spiegel will join ADB’s tax department. She will mainly focus on the area of tax compliance for private individuals and corporations.

Until then, Spiegel works as a specialist accountant at AXA Winterthur. 

more across site & shared bottom lb ros

More from across our site

Originators, loan purchasers and securitisation vehicles may need to revisit servicing agreements and pricing after a key judgment narrowed the VAT credit management exemption
Opening doors for existing talent within Baker McKenzie and a desire for enhanced legal capabilities informed Ricardo Perera’s switch from KPMG
Boaz Goren’s move to the upstart PE-backed firm takes the number of senior UK tax professionals who have left EY this year to 13
The allegations against Deloitte Cyprus raise uncomfortable questions about how far the big four can distance themselves from misconduct at member firms
The UAE accounted for most Middle East promotions and new rankings, as A&M Tax, Baker McKenzie, Dhruva Consultants and DLA Piper breached the top tier
Spanish-headquartered multinationals lead on reporting quality, while US and Swiss groups lag in the Fair Tax Foundation’s expanded analysis
Former IRS commissioner Danny Werfel joins ITR for a must-listen conversation spanning his time leading the agency, his AI risk framework, and the future of the OECD
Tax and legal services was PwC’s fastest-growing business line last year, helping to put the firm back on a par with its big four rivals
Ex-EY and Hourani & Partners leader Zain Satardien is using flexible staffing and AI-enabled systems to test a leaner model for specialist legal and tax advice
The big four firm is rightfully prioritising transparency and accountability as it seeks to rebuild from its scandal, but a glaring structural issue remains
Gift this article