Superior Client Service...


Our dedicated team works diligently and collaboratively to bring you individualized

attention and effective, timely tax solutions. We enjoy doing what we do,

which translates into positive client experiences.

Enrolled Agent, Principal

International Coverage...

EA Logo New.jpg

Darkoa Naito-Hanke

Darkoa has been practicing for close to 20 years, most of this time, outside the United States. She initially trained with and worked for PricewaterhouseCoopers-IAS and KPMG IES for close to ten years, in and outside the United States. Then, she established her own practice in Germany, following her

 move there with her German husband. Her educational background includes Financial and Managerial Accounting, Business Law and International Finance. She also holds a Masters Degree specializing in International Law and International Economics. She has significant experience of working with complex federal and state income tax returns, for all kinds of taxpayers, including employees, business owners, investors and high-net worth individuals. In addition, due to her multi-lingual skills, and her training and experience in one of the World's largest international expatriate tax practices, she is able to work with the tax return of any foreign country, in preparing U.S. federal and state income tax returns.

Carola Olt

Senior Accountant

Carola has many years experience of accounting and bookkeeping. She has a Diplom-Betriebswirtin from the Berufsakademie where she concentrated her studies on Accounting and Controlling. She assists with the preparation of complicated United States federal and state

income tax returns and Treasury forms. She is multi-lingual.

Sumiko Ragland

IRS Registered Tax Return Preparer & E-File Principal

Sumiko worked for many years with the Financial Industry Regulatory Authority (FINRA), after

studying accounting, business law and economics at the Santa Monica College in California. Before

her studies, she provided support to the PwC-IAS department in Tokyo for the processing of U.S. tax returns for client delivery. Sumiko is currently training to be an Enrolled Agent, and during the busy season, she spends some of her time volunteering for the IRS by assisting taxpayers 

at IRS Tax Centers in Texas where she is currently based. She is multi-lingual.

Rediet S. Admassu

Junior Accountant

Rediet has a B.A. in International Business Administration. Her educational background includes managerial and financial accounting, IFRS, economics, econometrics and she has a special

interest in international taxation. She assists with the preparation of United States

income tax returns and Treasury forms. She is multi-lingual.

Monika van Tienen

Office Support

Monika provides the team with general administrative support and also assists 

with the preparation of certain IRS and Treasury forms.

Ingo Hanke

Business Development

Ingo is involved with strategy and compliance, acquisitions and key accounts.

He holds an international MBA and has many years of managerial

experience at the international level.


Tel: 06101-995-3959 or 06101-995-0235

Fax: 06101-995-3958

An der Kirche, 61118 Bad Vilbel, Germany