Our team


Angela Radovcic


+41 58 300 6062

Miami +1 786 496 0040

Angela is an ATAS Director. Her core management skills and abilities in organization ensure a consistency of high quality service across all the ATAS offices. Angela is also a Senior Paralegal at Anaford Attorneys where she has been assisting U.S. and non-U.S. private clients with a particular focus on annual tax returns and regularizations, international tax, trusts and estates. Today, Angela harnesses her strong experience in management and high-level legal support in a dual role for ATAS and Anaford Attorneys.

Matthew Ledvina


+41 58 300 6060

Matthew is a U.S. and England and Wales tax lawyer. He is a TEP member of the Society of Trust and Estate Practitioners (STEP), a member of the International Tax Planning Association (ITPA), and a member of the New York Bar Association and UK Law Society.

Matthew is admitted to the U.S. Tax Court, and handles IRS tax controversy matters on a daily basis. He has been practicing U.S. tax law and advised international clientele for more than 15 years in the U.S., Europe and Switzerland. Matthew specializes in finding tax efficient solutions for his international clients.

Matthew is also fluent in French and has a valuable knowledge of the French and Swiss tax systems.

Milan Patel


+41 58 300 6060

Milan is a U.S. tax lawyer and Member of the New York Bar Association. He has been practicing U.S. tax law for more than 20 years in both the U.S. and Switzerland. Milan had previously worked as a U.S. Attorney for the Internal Revenue Service. This experience has enabled him to understand the U.S. tax system from a specific perspective that most U.S. tax lawyers practicing outside of the U.S. are lacking. Milan has been advising clients from all countries with regards to their U.S. tax obligations.


Timothy Lebrun

Tax Partner

+41 58 300 6063

Timothy is a U.S. Certified Public Accountant (CPA) with 19 years of experience in taxation, accounting, and financial services operations. He specializes in assisting private equity funds, hedge funds, family offices, high net worth individuals and other private investors with U.S. domestic and international taxation, tax due diligence and structuring, tax compliance, tax provisions and FATCA-related issues, as well as fund and special purpose vehicle operations.

Prior to working at ATAS,Timothy worked for 6 years in Switzerland managing U.S. tax operations for one of Europe’s largest private equity firms, was Tax Director of a Fund Service Group for 7 years at a midsize public accounting / fund administration firm in Miami, and worked for 6 years at a Big 4 accounting firm within their Financial Services Group in Florida and New York. He holds a Master’s Degree in Taxation and a Bachelor’s Degree in Accounting from Long Island University.

Namhee Lee

Senior Tax Consultant

+41 58 300 6066

Namhee is a highly skilled tax professional with 10 years’ experience managing U.S. individual expatriate tax issues for a broad client base in Switzerland and across Asia. She has significant experience in the preparation of U.S. Individual Annual Tax Returns for expatriate U.S. citizens with a particular focus on Foreign Asset reporting including PFIC, shares and bonds. Most recently her work has been focused on the efficient translation of foreign tax returns into IRS formats including the core 1040, FinCEN 114 (FBAR) and 8938 forms. Namhee also has extensive experience of U.S. tax compliance issues including submissions to the Offshore Voluntary Submission Program (OVDP) and the Streamlined Foreign and Domestic (SLF / SLD) filing procedures.

Namhee is a highly valued employee for her proactive and analytical approach to often complex tax issues as well as her ability to make transparent these issues to our broad client base.

Sameera Nathoo

Senior Tax Consultant

+41 58 300 6065

Sameera is an experienced UK and international tax accountant, a member of The Society of Trusts and Estate Practitioners (STEP) and a recipient of a Masters in Taxation from the University of London, Institute of Advanced Legal Studies in 2012.

Sameera specializes in international tax and accounting issues, with a particular focus on advising private client law firms, HNWIs, offshore trustees and UK trust beneficiaries on matters relating to UK residency, investment and property portfolios, taxation of offshore trusts in UK, voluntary disclosures to HMRC and annual UK tax filings.

Sameera is from Tanzania where she qualified as an accountant in 2001 before relocating to the UK and working as an in-house accountant for a multi-national conglomerate until 2012. Since then, she has been working as an independent international tax advisor based in London. Sameera joined ATAS as a consultant in January 2018 to further diversify our international tax expertise.

Sameera is fluent in several languages, written and spoken, including English, Kutchi, Gujarati, Hindi, Kiswahili and Urdu. For the past 6 years, Sameera has developed strong client relationships assisting many private clients on the technical details of their tax obligations.


Senior Tax Consultant

+17 86 496 0048

Siresha is an IRS enrolled agent (EA) with 12 years of experience in taxation. She earned her Master of Business Administration (MBA) in Finance and Marketing and Bachelor of Commerce degrees from India.

She specializes in international taxation and has significant experience in preparation and review of individual, corporate, partnership and high net worth individual tax returns. Siresha also has extensive experience in FBAR, FATCA, OVDP and PFIC.

Prior to working at ATAS, Siresha worked for 10 years in various Big 4 accounting firms in India and USA, where she handled inbound and expatriate tax related projects for various fortune 500 companies.

Support Staff

Chloe is a British economics graduate who studied in the U.K. Her areas of expertise within academic studies and professional experiences are accounting, taxation and mathematics. Since 2015 has been involved with international tax compliance, U.S. regularization matters and U.S. coordination.

Within U.S. legal teams in Switzerland, Henrieta brings a balanced set of organizational skills to our company. She has the ability to directly deal with people at all levels and from different backgrounds. She is fluent in several languages, written and spoken. Her mother tongue is Slovakian; she is professionally proficient in English, German and Czech and also understands Polish and Russian.


Tax Assistant

+41 58 300 6069

As a tax assistant, Sarah-Jane supports our team members in the preparation of required U.S. individual, trust and other informational tax returns. She is a valued member of the team. Enthusiastic and personable, she consistently ensures high-quality service to each of our local and international clients.

Sarah has a broad range of experience in client services and financial fields. She completed her Service Management and Engineering Master’s Degree in 2016 at the University of Applied Sciences and Arts Western Switzerland (HES-SO Master) in Lausanne, which has expanded upon her strong experience in providing excellent levels of customer service. As a highly motivated and proactive person, Sarah-Jane possesses a keen attention to detail combined with a team-minded and problem-solving approach. She speaks fluent French and English and basic German.