Clark Sackschewsky is a Tax Managing Principal and the National Natural Resources Practice Leader at BDO. Sackschewsky has more than 20 years of corporate tax experience in both public accounting and industry. Sackschewsky has extensive experience with Upstream and Downstream oil and gas, oilfield service, technology, and financial services industry and has served as a regional expert for tax in SOX 4040. He has worked on hundreds of oil and gas transactions and served as lead on over 50 different oil and gas clients. His significant experience includes ASC 740, tax planning implementation for US federal, state and cross border transactions, transfer pricing, and internal reorganizations.