Board of Directors

David c. Aldous

David Aldous
Mr. Aldous joined the Board in 2013 and became non-executive Chairman in 2018. He has over 30 years of corporate leadership experience in the energy, alternative energy, chemical and petrochemical industries. He currently serves as Chief Executive Officer and Director of Rive Technology Inc., a privately-held provider of solutions for diffusion-limited reactions to the refining, chemical and petrochemical industries. Prior to joining Rive Technology in 2012, Mr. Aldous ser ved as Chief Executive Officer and Director of Range Fuels Inc., a clean energy and biofuels company from 2009 to 2012. Mr. Aldous also spent more than 20 years employed by Royal Dutch Shell where he held the roles of Executive Vice President of Portfolio and Strategy, President of Shell Canada Products and President and CEO of CRI/Criterion, in addition to Director and Chairman of several Shell joint ventures. Mr. Aldous holds a B.S. in Fuels Engineering from the University of Utah and an MBA with distinction from Northwestern University.


Director & Non-Executive Chairman of the Board

kevin T. longe

Kevin Longe
Mr. Longe became DMC's President and Chief Executive Officer on March 1, 2013. He has served as a Director since joining the Company as Chief Operating Officer in July of 2012. From March 2011 until joining DMC, Mr. Longe served as an executive of Sonoco, Inc., first as President of Sonoco's Thermo Safe business from March 2011 to March 2012 and then as a Vice President and General Manager with Sonoco's Protective Packaging Division from March 2012 to July 2012. From April 2010 until joining Sonoco, Mr. Longe was self-employed performing consulting and investment work. From 2004 through 2010, Mr. Longe served in various positions at Lydall, Inc., most recently as president of its subsidiary, Lydall Performance Materials, Inc. Mr. Longe is a graduate of the University of Michigan and holds an MBA with Distinction from Northwestern University's Kellogg School of Business.


President, Chief Executive Officer and Director

andrea bertone

Andrea Bertone Director

Ms. Bertone was appointed as a DMC Director in February 2019. She has nearly 20 years of senior management experience in the energy industry in the Americas and most recently held the position of President of Duke Energy International LLC ("Duke Energy"). During her seven years in this role, she was responsible for operations across South and Central America. Previously, Ms. Bertone spent nearly 10 years in increasingly senior management roles with Duke Energy and its subsidiary companies. She is on the board of directors of Yamana Gold Inc., where she serves on the audit and risk and opportunities committees. She is on the board of directors for Peabody Energy Corp., where she serves on the audit and HSSE committees, and also is on the board of Amcor plc, where she serves on the compensation committee. Ms. Bertone completed her JD at the University of São Paulo, Brazil and received her LLM from Chicago-Kent College of Law in 1995. She also completed a finance program for senior executives at Harvard Business School in 2010. She is a member of the Brazilian Bar Association. In 2013, she received the Alumni of Distinction Award from Chicago-Kent College of Law, and in 2016, she was recognized by the National Safety Council through their annual "CEOs Who Get It" program, as a leader who demonstrates personal commitment to worker safety and health. 



robert a. cohen

Robert A. Cohen
Mr. Cohen has served as a DMC director since February 2011. Since 2005, he has been the managing partner of Joranel LLC, a private investment and consulting firm serving institutional clients. Prior to joining Joranel, he spent four years as President and Chief Executive Officer of Korea First Bank. Previously, Mr. Cohen spent 25 years with Credit Lyonnais, including eight years as Chief Executive Officer of Credit Lyonnais USA. He taught economics and finance for 16 years at the Paris Institut Technique de Banque et Finance and the French School of Management (ESSEC). He is a graduate of Ecole Polytechnique in Paris and earned a doctorate in finance from the University Paris Dauphine.



ruth I. dreessen

Ruth Dreessen
Ms. Dreessen was appointed by the Board as a director in 2020. She has more than 25 years of experience in financial leadership roles, specifically in the chemical industry. She currently serves as independent Chairman of Gevo, Inc., a renewable technology, chemical products and advanced biofuels company, where she also is a member of the audit committee and the compensation committee, and is chair of the nominating and corporate governance committee. Ms. Dreessen has served on eight public and private-company boards during her career, and has chaired three audit committees. From 2010 to December 2018, Ms. Dreessen served as Managing Director of Lion Chemical Partners, LLC, a private equity firm focused on chemical and related industries. From 2005 to 2010, she served as the Executive Vice President and Chief Financial Officer of TPC Group Inc. Before joining TPC Group, she served as Senior Vice President, Chief Financial Officer and Director of Westlake Chemical Corporation. She spent 21 years at J.P. Morgan Securities LLC and predecessor companies, ultimately as a Managing Director of chemicals investment banking. Ms. Dreessen received her undergraduate degree from the New College of Florida and holds a master’s degree in International Affairs from Columbia University. 



richard P. graff

Richard Graff

Mr. Graff has served as a DMC Director since June 2007. He is a retired partner of PricewaterhouseCoopers LLP where he served as the audit leader in the United States for the mining industry, until his retirement in 2001. Mr. Graff began his career with PricewaterhouseCoopers in 1973. Since his retirement, he has been a consultant to the mining industry and was a member of a Financial Accounting Standards Board task force for establishing accounting and financial reporting guidance in the mining industry. He represents a consortium of international mining companies and has provided recommendations to the International Accounting Standards Board on mining industry issues and to regulators on industry disclosure requirements of securities legislation. Mr. Graff serves on the board of directors of Yamana Gold Inc. and Alacer Gold Corporation. He received his undergraduate degree in Economics from Boston College and his post-graduate degree in Accounting from Northeastern University.




Michael A. Kelly

Mr. Kelly was appointed as a DMC Director in July 2020. He is president of Sentry Hill Partners, LLC, a global life sciences transformation and management consulting business founded by Mr. Kelly in 2018. From 2003 to 2017, he held a variety of senior and executive leadership positions with Amgen Inc., one of the world’s largest independent biotechnology companies. From 2014 to 2017, he was Senior Vice President of Amgen’s Global Business Services division. He twice served as Amgen’s acting CFO, and also was Vice President of Commercial Operations, and Vice President and CFO of Amgen’s International Commercial Operations. From 2000 to 2003, Mr. Kelly was CFO of publicly traded TANOX, Inc. He also held financial leadership positions with BIOGEN, Inc., and NutraSweet Kelco Company, a subsidiary of Monsanto Life Sciences. Mr. Kelly is an independent member of the board of directors for publicly traded Hookipa Pharma, Inc., where he also is the audit committee Chairman. He serves on the Council of Advisors and was the former audit committee Chairman for Direct Relief, a humanitarian aid organization active in all 50 U.S. states, and more than 80 countries. Mr. Kelly received a Bachelor of Science degree in business administration from Florida A&M University.


peter rose

Peter Rose

Mr. Rose has served as a DMC Director since November 2016. He is a senior advisor to Blackstone, the world's largest alternative asset manager. From 2007 to 2016, he was a senior managing director with Blackstone, and served as its global head of public affairs. Mr. Rose also spent 20 years with Goldman Sachs, where he was a Managing Director and held a variety of senior positions in government relations and media relations in Washington DC, New York and Hong Kong. Mr. Rose currently is Vice Chairman of Sard Verbinnen, one of the leading strategic communications firms in the United States. From 1983 to 1987 he was Chief of Staff to Congressman Mike Synar (D-Okla) and a partner with the law firm of Williams and Jensen in Washington DC. Mr. Rose is a graduate of the George Washington University and the Yale Law School. He serves on the national board of the NAACP, the oldest and largest civil rights organization in the United States. He is also on the board of the Poetry Society of America.




Chairperson  Chairperson        
Member  Member Audit Committee Compensation Committee Governance and Nominating Committee Risk Committee

Independent Directors

 Richard P. Graff Chairperson     Member
 Robert A. Cohen   Chairperson  Member   
David Aldous Member Member                 
Peter Rose   Member Chairperson  
 Andrea Bertone      Member  Chairperson
 Michael A. Kelly  Member      Member
 Ruth I. Dreessen  Member      

Non-Independent Directors

 Kevin T. Longe       Member


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