WHY US
ONE is dedicated to serving the accounting and tax needs of small to midsized businesses and individuals. We boast a qualified team of international financial professionals and offer a free initial consultation, so you can get to know us and learn about our services. When you become our client, you’ll always be treated like a valued customer. Some CPA firms are missing in action when you have a question - not us.
OUR SERVICES
ADVISORY
ONE consulting professionals are experienced CFOs, CPAs, CEOs with expertise in different business environments and countries.
TAX
We handle individual and corporate taxation. Not only fully compliance but we elaborate effective tax planning strategies to minimize your tax liabilities.
INTERNATIONAL
ONE International Tax professionals specialize in international taxes. We will help you stay compliant in every country and help you lower your tax liabilities in any regime.
MEET OUR TEAM OF BUSINESS, TAX & ACCOUNTING ADVISORS
People 3
As a team of multi-country origin, we provide our international clients with a sensible understanding of their business culture.
Giovanni Iammarrone
CPA - Managing Partner
Shaina Holtzberg
HR Assistant
Rivka Holtzberg
Assistant Manager
Sergio Cattaneo
CPA - Principal
Nicola Camarda
Associate
Sergio Serafin Spera
Partner Advisory
Luca de Andrade
Senior Associate
Carla Green
Associate