J Walker Johnson is a tax partner in Steptoe’s Washington, DC office. Mr Johnson formerly was a trial attorney in the Tax Division, US Department of Justice, where he litigated numerous tax cases. Since 1987 he has been an adjunct law professor in the Graduate Tax LLM Program at the Georgetown University Law Center, presenting a course on the Taxation of Financial Institutions and Products. Mr Johnson’s tax controversy practice includes audit examinations, technical advice requests, protests, IRS Appeals proceedings, refund claims, and tax litigation. He has litigated numerous cases in district court, the Tax Court and the Court of Federal Claims, as well as in various Circuit Courts of Appeals and the United States Supreme Court. At Steptoe, he has litigated numerous major tax cases, including cases such as New York Life (payment vs. deposit), American Electric Power (COLI policies), Textron (tax accrual workpapers), John Hancock (cross-border leveraged leasing), and others. On the tax planning side his practice has included company, financial product and investment tax issues, corporate transaction matters, captive insurance, and penalty and interest questions. This work on behalf of a wide variety of clients has involved giving informal advice, issuing opinion letters and obtaining private letter rulings from the IRS National Office. He is recognised as a leading tax litigator by Chambers, The Legal 500 and Best Lawyers in America.