barbara angus
Barbara M. Angus, Chief Tax Counsel, House Committee on Ways and Means

Barbara M. Angus currently serves as the Chief Tax Counsel for the House Committee on Ways and Means. Before being appointed by Chairman Brady in February 2016, Ms. Angus was a Principal with Ernst & Young where she was the leader of EY's strategic international tax policy services practice. In previous public sector roles, she served as International Tax Counsel for the Treasury Department and Business Tax Counsel for the Congressional Joint Committee on Taxation. She received her bachelor’s degree from Dartmouth College, her JD from Harvard Law School, and her MBA from the University of Chicago.



Christopher J. Bello, Chief, Branch 6, Office of the Associate Chief Counsel, Internal Revenue Service
Chris Bello is the branch chief for Branch 6 of the Office of the Associate Chief Counsel (International), IRS.  Branch 6 is responsible for international transfer pricing as well as a number of other issues.  Chris was a drafter and reviewer of the proposed, temporary, and final cost sharing regulations and was the reviewer of the final services regulations.  He has been a member of the U.S. delegation to OECD Working Party No. 6 on the Taxation of Multinational Enterprises for eight years, working on matters including the revision of Chapters I through III of the Transfer Pricing Guidelines and the addition of Chapter IX, the project on intangibles, and the base erosion and profit shifting project.  Chris obtained an undergraduate degree from Princeton University in 1996, a law degree from the University of Virginia School of Law in 1999, and an L.L.M. in taxation from the University of Florida School of Law Graduate Tax Program in 2000, and is a member of the Florida Bar. 


dick harvey
J. Richard Harvey, Professor of Practice, Villanova University Charles Widger School of Law School and Graduate Tax Program

Dick Harvey is the Distinguished Professor of Practice at the Villanova University Charles Widger School of Law School and Graduate Tax Program.  He also has 40 years of multifaceted tax experience including: (i) government official during the Reagan, Bush II, and Obama administrations; and (ii) Tax Partner at PricewaterhouseCoopers (retired).  Prof. Harvey was the first expert witness at the May 2013 Permanent Subcommittee on Investigations hearing surrounding Apple’s international tax planning.  Immediately prior to joining the Villanova faculty, Prof. Harvey was the Senior Advisor to IRS Commissioner Doug Shulman advising on tax administration and policy issues, including highly publicized IRS efforts to (i) address off-shore tax evasion by individuals, and (ii) increase transparency by business taxpayers.  During negotiation and implementation of the 1986 Tax Reform Act, Prof. Harvey was the Senior Accountant in the U.S. Treasury Department, Office of Tax Policy.  


Brian Jenn, Attorney-Advisor, Office of International Tax Counsel, US Treasury
Mr. Jenn joined the Office of the International Tax Counsel in the Treasury Department's Office of Tax Policy in January 2012.  At Treasury, he focuses on a wide range of international tax legal and policy issues, developing regulations and other guidance related to subpart F, foreign currency issues, transfer pricing, digital economy and cloud issues, and cross-border reorganizations. He is a U.S. Treasury delegate to OECD’s Working Party 6 on Transfer Pricing, which has responsibility for the development of the OECD Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations.  Mr. Jenn is also Treasury’s delegate to the OECD’s Task Force on the Digital Economy, which examines digital economy issues as part of the OECD/G-20 Base Erosion and Profit Shifting (BEPS) project. Mr. Jenn earned his B.A. and M.A. (Economics) at Northwestern University and his J.D. at Yale Law School.  Prior to joining Treasury, Mr. Jenn worked on international tax issues at a law firm in Washington, DC, and served at the Council of Economic Advisers (2001-2003) and in the U.S. Senate on the Chairman’s staff of the Joint Economic Committee (2003-2004).


John Hughes, Senior International Advisory - Treaty and Transfer Pricing Operations, Internal Revenue Service
John Hughes is Senior International Advisor to the Treaty and Transfer Pricing Operations practice area in the IRS.  John joined the IRS in September 2011.  Prior to being named Senior International Advisor, he served as a senior manager in APMA.  Before joining the IRS, John worked at the Washington offices of Mayer Brown LLP.  John received a JD and a Master’s degree in Applied Economics from the University of Michigan in 1999.


aruna kalyanam
Aruna Kalyanam,
Democratic Tax Counsel, House Committee on Ways and Means
Aruna Kalyanam is Democratic Tax Counsel, House Committee on Ways and Means and Democratic Staff Director, Subcommittee on Select Revenue Measures. She has been on staff with the House Committee on Ways and Means since 2001. Her work is focused primarily on Federal tax policy, including health care and pension tax issues, as well as issues regarding the Federal budget. Ms. Kalyanam’s areas of expertise include individual taxation, economic development taxation, and energy taxation. She has worked on a number of important pieces of legislation during her time with the Committee, including the American Taxpayer Relief Act and the American Recovery and Reinvestment Act. Ms. Kalyanam has also worked for Joint Select Committee on Deficit Reduction Member Xavier Becerra. Prior to joining the Committee, Ms. Kalyanam started working on Capitol Hill in the office of Congressman Charles Rangel (D-NY). Ms. Kalyanam is a graduate of the Washington College of Law at American University and has a Bachelor of Arts degree from Washington University in St. Louis.


Gert-Jan Koopman

Gert-Jan Koopman, Deputy Director-General for State Aid, European Commission
Since 1 November 2010, Gert Jan Koopman has served as the Deputy Director General for State Aids at the European Commission's Directorate General for Competition (DG COMP). In this capacity he is responsible for the Commission's control of State Aids and the co-ordination of the 1000 State Aid cases managed by thirteen units in DG COMP. Prior to this, Mr. Koopman was Director for "Policy Strategy and Co-ordination" and before that for the "Economic Service and Structural Reform" Directorate at the European Commission's Directorate-General for Economic and Financial Affairs (DG ECFIN).

todd metcalf
J. Todd Metcalf, Democratic Chief Tax Counsel, Senate Finance Committee

Todd Metcalf serves as the Chief Tax Counsel on the Senate Finance Committee. He also served as Chief Tax Counsel for Senator Ron Wyden (D-Ore). Mr. Metcalf spent nine years in various senior roles in the House of Representatives, including House Floor Director and Counsel to the Majority Whip, Rep. James E. Clyburn, and followed his tenure in the House with a year as the Deputy Director for the Department of Labor’s Office of Recovery.

Donna McComber, APMA Assistant Director, Internal Revenue Service
Donna McComber is Assistant Director of the IRS's Large Business & International division Advance Pricing and Mutual Agreement Program (“APMA”).  She has been with the IRS since April 2007; she is responsible for reviewing U.S. negotiation position for complex transfer pricing transactions and negotiating APA and MAP cases with treaty partners.  In addition, she has worked on a number of significant transfer pricing projects including financial products cases and the IP migration cases.  


mark prater
Mark Prater, Republican Chief Tax Counsel, Senate Finance Committee

Since November 1993, Mr. Prater has served as Chief Tax Counsel on the Republican staff of the Senate Finance Committee and since January 2007, has also served as Deputy Staff Director of the Republican staff. In September of 2011, Mr. Prater was selected as Staff Director for the Joint Select Committee on Deficit Reduction, (“JSCDR”) i.e. the Super Committee. Prior to his work on Capitol Hill, Mr. Prater practiced with Touche Ross from 1984 to 1986 and a Portland law firm, Dunn, Carney et al. from 1987 to 1990. Mark Prater graduated from Portland State University with a B.S. in accounting. He also obtained a J.D. from Willamette University and an LL.M. in Taxation from the University of Florida.

carlos perez gomez serrano 5 2016
Carlos Pérez Gómez Serrano, Director of Transfer Pricing, Mexican Tax Administration Service 

Carlos Pérez Gómez Serrano is Director of Transfer Pricing in the Tax Administration Service (Ministry of Finance In Mexico). He has a degree in Economics from Universidad Iberoamericana and a Master in Valuation. He has participated as exponent and instructor in Transfer Pricing Forums and courses to foreign governments, as the Mexican Delegate in the Working Party 6 (WP6) in the Organization for Economic Co-operation and Development (OECD), included the “Base Erosion and Profit Shifting” Project (BEPS), and as a member of the United Nations Subcommittee on Transfer Pricing.

Sharon Porter
Sharon R. Porter is the Director, Treaty & Transfer Pricing Operations (TTPO), Internal Revenue Service.
TTPO is housed within the Large Business and International.  Sharon has responsibility for planning, developing, directing, and implementing a comprehensive strategy to address compliance with transfer pricing laws through all forms of compliance including examination, advanced pricing arrangements, and the mutual agreement program.  Her organization is also responsible for the effective management of U.S. treaty relationships.  Sharon leads a staff of over 400 with a national footprint and is comprised of the Transfer Pricing Practice, Advance Pricing and Mutual Agreement (APMA) program and Treaty Administration. Sharon began this Executive assignment in 2016 and has served in various other Executive roles in the Internal Revenue Service since 2011.
Ted Setzer
Theodore Setzer, Assistant Deputy Commissioner - International, Internal Revenue Servic
Ted Setzer is the Assistant Deputy Commissioner (International) within the Large Business and International Division of the United States Internal Revenue Service.  In this role, he bears responsibility for matters of international policy and protocol within LB&I.  He coordinates the IRS’s engagements with multilateral organizations including the Organization for Economic Cooperation and Development (OECD), the Forum on Tax Administration (FTA), and the Global Forum on Transparency and Exchange of Information for Tax Purposes. 

Ted previously served as Director of the Foreign Payments Practice within LB&I.  In that role, he was responsible for developing and coordinating LB&I’s overall international information reporting and withholding tax compliance activities.  Prior to joining LB&I, Ted spent nearly ten years in the IRS Office of Chief Counsel, most recently as Deputy Associate Chief Counsel for Strategic International Programs, where he oversaw his office’s role in negotiating, interpreting, and administering tax treaties and other international agreements.  Ted also represented the Office of Chief Counsel at the OECD and other multinational organizations and played a major role in coordinating the IRS’s strategy for combating abusive tax shelters.  Prior to joining the IRS, Ted practiced law at firms in Washington, D.C. and Phoenix, Arizona.

Ted holds a B.S.B.A. from Northern Arizona University (1991), a J.D. from the University of Arizona (1994), and an LL.M. in taxation from New York University (1995).

Robert Stack
Robert Stack, Deputy Assistant Secretary (International Tax Affairs), US Department of the Treasury, Washington, DC, United States
Robert Stack is the Deputy Assistant Secretary for International Tax Affairs in the Office of Tax Policy at the US Department of the Treasury. In this capacity, he is responsible, on behalf of the Assistant Secretary, for the conduct of legal and economic aspects of tax policy relative to the representation of the United States in bilateral and multilateral relations with other countries, as well as advising the legal and economic staffs within the Office of Tax Policy, other offices of the Treasury Department and other government agencies as to policy analysis and interpretation for domestic legislation and administrative guidance in all matters involving cross border taxation.

Catherine Schultz
Catherine Schultz, Vice President for Tax Policy, National Foreign Trade Council
Catherine Schultz is the Vice President for Tax Policy at the National Foreign Trade Council.  Her responsibilities include international tax policy including legislative, regulatory, non-U.S. tax policy, administration, and tax treaty activity. Prior to joining the NFTC, she was a Principal at Capital Strategies Group, LLC, where she represented client interests on pending tax legislation and served as a legislative advocate on international taxation, research and development, depreciation and capital gains.  Ms. Schultz participates in the OECD Technical Advisory Group on the taxation of cross-border services under the VAT, and is a member of the International Fiscal Association.  She is on the faculty of the Practising Law Institute’s Basics of International Taxation program. 
Cheryl Teifer
Cheryl A. Teifer is the Director, Field Operations for the Transfer Pricing Practice (TPP), Internal Revenue Service.  
TPP is housed within the Treaty and Transfer Pricing Operations for the Large Business and International Division (LB&I).  Cheryl has responsibility and oversees the field operations supporting transfer pricing strategies.  She leads a staff of Tax Law Specialist, Revenue Agents and Economist with a national footprint. Cheryl began this executive assignment in February 2016.

Cheryl’s previous executive assignments include the Assistant to the Transfer Pricing Operations Director, and the Acting Director, Field Operations for the Financial Service Industry responsible for administering tax compliance for commercial and foreign banks, insurance companies, investment banks, mutual funds and other financial intermediaries.

mike williams
Mike Williams, Director of Business and International Tax, HM Treasury

Mike Williams is Director Business and International Tax at HM Treasury.  As such he is responsible for corporation tax, capital gains tax, value added tax, other consumption taxes, international tax and environmental taxes.  His main tax expertise is in international tax and banking. Mike is the UK delegate to and Deputy Chair of the OECD’s Committee on Fiscal Affairs, Chair of the ad hoc group for the development of a multilateral instrument on tax treaty measures, and is also a member of the Steering Group of the Global Forum on Transparency and Exchange of Information for Tax Purposes. Among previous posts, Mike was Director of Personal Tax and Welfare Reform (HM Treasury, 2008-2010), Director of International Tax (HM Treasury, 2004-2008), and Deputy Director of International (Inland Revenue, 2001-2004). Mike has a degree in physics from Balliol College, Oxford.

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