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Corporate Governance

Board of Directors

Our Board of Directors is a diverse group of leaders with outstanding expertise. Many have leadership experience at major domestic and international companies with global operations. They bring experience in key market sectors reflecting our customer base, government relations, and financial and management expertise. They share the candor, integrity and commitment essential to an effective board of directors.

Seifollah Ghasemi

Seifollah Ghasemi

Chairman of the Board

Seifollah (Seifi) Ghasemi became Chairman, President and Chief Executive Officer of Air Products and Chemicals, Inc. in July 2014.

Prior to this appointment, Mr. Ghasemi was an independent member of Air Products’ board of directors. From 2001-2014, Mr. Ghasemi served as Chairman and Chief Executive Officer of Rockwood Holdings Inc., a global leader in inorganic specialty chemicals and advanced materials, which was acquired by Albemarle Corporation in January 2015. From 1997-2001, he held leadership roles at GKN, a global industrial company, including positions as Director of the Main Board of GKN, plc, and Chairman and Chief Executive Officer of GKN Sinter Metals, Inc. and Hoeganes Corporation. Earlier in his career, Mr. Ghasemi spent nearly 20 years with The BOC Group (an industrial gas company which is now part of Linde AG) in positions including Director of the Main Board of BOC Group, plc; President of BOC Gases Americas; and Chairman and Chief Executive Officer of BOC Process Plants, Ltd. and Cryostar.

Mr. Ghasemi earned his undergraduate degree from Abadan Institute of Technology and holds an M.S. degree in mechanical engineering from Stanford University.

Mr. Ghasemi has deep experience in the specialty chemicals industry. His prior executive leadership of an international chemicals company will provide the Board with broad experience in many of the challenges Versum will face, such as portfolio management, strategic planning, talent management, and international operations.

Jacques Croisetière

Jacques Croisetière


From August 2009 to December 2012 Mr. Croisetière was the Senior Vice President and Chief Financial Officer at Bacardi Limited. Before Bacardi Limited he worked at Rohm and Haas Company as the Executive Vice President, Chief Financial Officer and Chief Strategy Officer from April 2003 to April 2009, and before that was the Vice President, European Region Director and Director Ion Exchange Resins and Inorganic Specialty Solutions from July 1999 to March 2003.

Mr. Croisetière earned a degree in Industrial Management from C.E.G.E.P. Ahuntsic, a degree in Accounting Science and a Bachelor of Science degree in Finance from University of Montreal, Hautes Etudes Commerciales.

As the former chief financial officer of multinational companies Mr. Croisetière brings extensive financial expertise and management experience, including experience in the specialty materials industry, to the Board.


Guillermo Novo


Guillermo Novo is the President and CEO of Versum and is a member of its board of directors.

He joined Air Products in 2012 as Senior Vice President Electronics, Performance Materials, Strategy and Technology. Mr. Novo had served as Executive Vice President, Materials Technologies of Air Products since October 2014.

Prior to joining Air Products, Mr. Novo was employed by Dow Chemical Company where he most recently served as group vice president, Dow Coating Materials, a large specialty chemicals business. He began his career in 1986 with Rohm and Haas Company (which merged with Dow in 2009) and over the next 24 years progressed through a variety of commercial, marketing, and general management positions, living in South America, the U.S., and Asia. In 1998, Mr. Novo was named a vice president at Rohm and Haas, and in 2006 he became a corporate officer and one of five group executives on the corporate leadership team responsible for driving the overall strategy for the company.

Mr. Novo holds a B.S. degree in industrial engineering from the University of Central Florida and an MBA from the University of Michigan.

Mr. Novo has thirty years of experience in the specialty materials industry and will bring to the Board detailed insight into Versum’s customers, markets, operations and strategies.

Yi Hyon Paik

Yi Hyon Paik


Until April 2016, Mr. Paik was the President and Chief Strategy Officer of Samsung SDI Company since 2014. Prior to Samsung SDI Company, he was the Executive Vice President and Head of Electronic Materials Business at Samsung Cheil Industries from 2010 to 2013. From 2009 to 2010 Mr. Paik worked at the Dow Chemical Company as the Business Group Vice President and Head of Electronic Materials Business. Before the Dow Chemical Company he served at the Rohm and Haas Company as the Business Group Vice President and President of Electronic Materials Business and before that as the Vice President and President of Microelectronics Business.

Mr. Paik earned a Bachelor of Arts and Master in Chemistry from Seoul National University, a Ph.D. in Chemistry at the University of Pittsburgh and a Postdoctoral Fellow at Columbia University.

Mr. Paik will provide the Board with over 25 years of technical background and experience in multi-national companies and the electronic materials industry.

Thomas J. Riordan

Thomas J. Riordan


Mr. Riordan served as the Chief Legal/Administrative Officer and Board Secretary of Rockwood Holdings, Inc. from 2000 to 2015 while also serving as the Senior Executive Vice President from 2014 to 2015, the Senior Vice President from 2005 to 2013 and before that as Vice President from 2000 to 2005. Before Rockwood Holdings, Inc. he worked at Laporte plc from 1989 to 2000 as the Vice President, US General Counsel while also serving as Administrative Officer from 1995 to 2000.

Mr. Riordan earned a Bachelor of Arts and Master in Business Administration from Loyola University and a Juris Doctor from Northern Illinois University.

Mr. Riordan will provide the Board with the benefit of over 40 years of senior executive experience with global companies including human resources and specialty materials experience.

Susan C. Schnabel

Susan C. Schnabel


Ms. Schnabel is the Co-Founder and Managing Partner of aPriori Capital Partners, an independent leveraged buyout fund advisor created in connection with the spin-off of DLJ Merchant Banking Partners (“DLJMBP”) from Credit Suisse (“CS”) in 2014. Prior to forming aPriori Capital, Ms. Schnabel worked at Credit Suisse from 1998 to 2014 where she served as a Managing Director in the Asset Management Division and Co-Head of DLJ Merchant Banking. Ms. Schnabel formerly has served on the boards of numerous public companies including Neiman Marcus, STR Holdings, Rockwood Specialties and Shoppers Drug Mart. She also serves on the Harvard Business School Alumni Advisory Board, the Cornell University Trustee Council, US Olympic & Paralympic Foundation Board of Directors, and the board of directors of the Los Angeles Music Center Foundation.

Ms. Schnabel earned a Bachelor of Science in Chemical Engineering from Cornell University and a Masters in Business Administration from Harvard Business School.

Ms. Schnabel will provide the Board with her extensive financial and management expertise, and significant board of directors experience.

Alejandro Wolff

Alejandro D. Wolff


Ambassador Alejandro D. Wolff served U.S. Ambassador to the United Nations (2005-2010) and the Republic of Chile (2010-13). He retired from the U.S. State Department in 2013 with the rank of Career Minister after a 33-year career during which he also served as Deputy Chief of Mission and Acting U.S. Ambassador in France. He has held key diplomatic positions at U.S. Embassies to the EU, Cyprus, Morocco and Algeria. His assignments in Washington included tours on the Policy Planning Staff (1981-82), in the Office of Soviet Union Affairs (1988 to 1989), in the Office of the Under Secretary for Political Affairs (1989-1991), as Deputy Executive Secretary of the State Department (1996-1998), and as Executive Assistant to Secretaries of State Madeleine Albright and Colin Powell (1998-2001).

Ambassador Wolff advises businesses and governments on political and commercial matters, having served as Managing Director of Gryphon Partners until June 2016. He has been a Director of Albemarle Corporation since January 2015 and previously of Rockwood Holdings, Inc., since August 2013.

Ambassador Wolff graduated Magna Cum Laude from the UCLA.

Ambassador Wolff brings to the Board substantial experience in government and international affairs, and distinguished leadership experience.


Our Audit Committee and our Board of Directors have established procedures for the receipt, retention and treatment of complaints pursuant to Rule 10A-3(b)(3) under the Securities Exchange Act of 1934 and have established a means for communicating with the non-management members of the Board of Directors pursuant to Section 303A(3) of the New York Stock Exchange Listed Company Manual.

Any employee or stockholder may report to the Audit Committee any accounting allegation, legal allegation or retaliatory act.  Reports can be made in writing to Versum Materials, Inc., Attn: Audit Committee, 7201 Hamilton Boulevard, Allentown, Pa 18195.  In addition, reports can be made (i) by contacting the General Counsel in writing at Versum Materials, Inc. Attn: General Counsel, 7201 Hamilton Boulevard, Allentown, Pa 18195, (ii) by submitting a report online at or (iii) by calling the Integrity Line at 1-855-883-2429 at any time. Reports by employees using any of the above methods may be made anonymously.

To (i) contact our Board of Directors, (ii) communicate with the non-management members of the Board of Directors, or (iii) communicate with management, so indicate in your communication and mail correspondence to the following address:

Versum Materials, Inc.
Attn: General Counsel
7201 Hamilton Boulevard
Allentown, Pa 18195

You may indicate whether you are a stockholder, customer, supplier, or other interested party. When possible, we will acknowledge receipt of your complaint or concern.