Meet the Online Taxman Team

Our team members are not only highly qualified expat tax professionals. They are also expats themselves. As such they understand firsthand the situation of Americans abroad. Some are also entrepreneurs and are keen on helping other entrepreneurs with tax and related services.

Vincenzo Villamena

Founder, CEO

Vincenzo Villamena, CPA
Founder, CEO

Vincenzo is the founder and CEO of Online Taxman. He has extensive experience in both tax preparation and advising clients in accounting and financial transactions.

At Online Taxman, Vincenzo oversees corporate and individual filings. He specializes in offshore structuring for US entrepreneurs abroad and US real estate transactions by foreign nationals and funds.

Before founding Online Taxman, Vincenzo served as partner in 4 Corners Inc., focusing on individuals and businesses for accounting and tax preparation matters as well as advising high net worth individuals in private equity investing.

Vincenzo also has “Big 4” audit and corporate accounting experience during his time with PricewaterhouseCoopers, involved in Fortune 100 audit engagements and M&A transactions, giving him the knowledge to perform analysis in valuation, corporate finance, and technical accounting issues.

He has both a Masters of Accounting and Bachelors of Business Administration with distinction from the University of Michigan’s Stephen M Ross School of Business.

Vincenzo loves to travel and is fluent in Spanish, Portuguese and Italian. Vincenzo currently lives in Medellin, Colombia, the location of our newest office.


Partner, COO

John Hamilton, CPA
Partner, COO

John has been with Online Taxman since the beginning and serves as partner and COO. He is experienced in individual and small business taxation, holistic financial planning, as well as pensions and investments.

John is a CPA in the State of Illinois. Prior to joining Online Taxman, he spent his early career working in financial services, creating needs based financial plans for individuals and built his own tax practice as a sole proprietor in the Chicagoland area. John also spent time as a client finance manager at Accretive Health and was a financial consultant at Huron Consulting Group, consulting on litigation matters for Fortune 500 companies. John holds a Master of Science in Accounting from Boston College and Bachelor of Arts in Economics from the University of Michigan.

John started his expat life in Australia and subsequently lived in Spain, Argentina, and Colombia. He now calls Rio de Janeiro home. John is fluent in Spanish and and is currently learning Portuguese.

George Varimezov

George Varimezov

George specializes on the fast-paced small business community, by providing bookkeeping support as well as owners’ and entrepreneurs’ individual tax returns. He brings particular expertise in preparing financial statements for web-based businesses, nonprofits and real estate companies.

A native of Bulgaria, George also has considerable audit experience with employee benefit plans, nonprofit organizations, hospitality, and publicly traded companies.

George is located in the Boston area. He is a member of the AICPA and is certified in the states of NY and MA.


Viktor Krig

Viktor has been with Online Taxman since 2013, where he mainly focuses on corporate formations and US expat taxes. Thanks to his fluency in Spanish and Swedish, Viktor has been working with many of our Latin American investors and entrepreneurs to incorporate and structure companies in the US to meet their international business needs, and with US clients located in Spain and Scandinavia.

Viktor has been living abroad since studying Business Management and Accounting at Universidad de la Empresa, Buenos Aires, Argentina, and EAFIT in Medellín, Colombia. He also lived in Barcelona, Spain, and Medellin, Colombia. He now calls Lviv in the Ukraine home.


Ross Lustman, JD, CPA, EA

Ross joined Online Taxman after more than five years of working exclusively in US expat taxation in boutique accounting firms. He holds a Bachelor of Arts in Business from the University of New Hampshire, a Bachelor of Science in Accounting from the University of South Florida, and a Juris Doctor from Stetson University College of Law. He holds a law license, a CPA license, and an active Enrolled Agent license.

Ross lives full time in Costa Rica, but travels throughout Central and South America.

Gaurav (Kevin)

Kevin (Gaurav) Daswani, CA

Kevin joined Online Taxman after more than seven years of experience in US taxation & accounts. He worked exclusively in US expat taxation for more than three years of his professional career, and as a financial controller for US clients for couple of years. He is a Chartered Accountant (equivalent to CPA) and also holds a Master of Commerce degree from Gujarat University.

Kevin loves to travel, speaks English and Hindi, and currently lives in India.


Nicholas Roscher, EA

Nicholas joined Online Taxman in 2019 as expatriate and international tax specialist.

Nick has over 7 years tax experience, including all aspects of expat tax preparation. He holds a BS and MS in Accounting from Fordham University and is a certified Enrolled Agent with the IRS.

Originally from New York, Nick now lives with his wife in Madrid, Spain.


Tracy Cooklin, EA

Tracy joined Online Taxman in 2019 as expatriate and international tax specialist.

Tracy has extensive experience advising expats in individual and business US tax matters. She holds a BS in Accounting from Montana State University and a MS in Taxation from Golden State University. Tracy is a certified Enrolled Agent with the IRS.

After spending a few years in Germany, Nick now lives in Henderso, Nevada. Besides English, she is fluent in German and Dutch.


Ruth Vahle, PhD

Ruth joined Online Taxman in 2016 to head up Marketing. She is also involved in improving overall business processes and client satisfaction.

After a corporate career in strategy, portfolio and project management, most recent as Director Strategy & Innovation at a large global medical technologies company, Ruth shifted her focus to help smaller businesses with strategic positioning, online presence and marketing.

She has lived in Europe, the US, Asia, and now has a home base Medellin, Colombia. Ruth speaks English, German, Spanish and a little Mandarin.


Mane Stanisic

Mane Stanisic supports our team as office manager and handles company formations for our LLC clients.

Mane has a background in sales, training and customer service. He is from Serbia, where he attended the University of Belgrade.

Mane speaks Serbian and English and has traveled and volunteered extensively in Europe.


Kyle Brown

Kyle serves in an advisory role as CTO. He helped starting Online Taxman and continues to advise on technology and IT aspects.

Kyle holds a M.S. in Systems Engineering from Johns Hopkins University and a B.S. in Electrical Engineering from the University of Maryland. He has 15 years experience designing and delivering complex applications ranging from e-commerce to defense systems.

He is based on the US East Coast but, like other team members, traveled extensively across Europe and South America.


Ari Good, JD LLM

Ari Good is a tax attorney with over twenty years of experience. He has helped hundreds of clients plan their tax affairs, including by utilizing tax-favorable structures, and has exceptional results representing taxpayers against the IRS and state departments of revenue.

Ari graduated from the DePaul University College of Law and received his LL.M. (Masters of Law – Taxation) from the University of Florida.