Board of Directors

jean s. blackwelld

jean s. blackwell

In May 2016, Ms. Blackwell joined the board of directors of Ingevity Corporation, a leading global manufacturer of specialty chemicals and high performance carbon materials. She currently serves as the chair of Ingevity’s audit committee and as a member of its compensation committee. Ms. Blackwell has served as a member of the board of directors of Essendant Inc. (formerly United Stationers Inc.), a leading national wholesale distributor of business products, since May 2007, including currently as the chair of the governance committee and as member of the finance committee and previously as the chair of the human resource committee. She previously served as a member of the board of directors from April 2004 to November 2009, and as chairperson of the audit committee, of Phoenix Companies Inc., a life insurance company. Ms. Blackwell served as Chief Executive Officer of Cummins Foundation and Executive Vice President, Corporate Responsibility, of Cummins Inc., a global power leader that designs, manufactures, distributes and services diesel and natural gas engines and engine-related component products, from March 2008 until her retirement in March 2013 and previously served as Executive Vice President and Chief Financial Officer from 2003 to 2008, Vice President, Cummins Business Services from 2001 to 2003, Vice President, Human Resources from 1998 to 2001 and Vice President and General Counsel from 1997 to 1998 of Cummins Inc. Prior to joining Cummins, Ms. Blackwell was a partner at the Indianapolis law firm of Bose McKinney & Evans LLP from 1984 to 1991, where she practiced in the area of financial and real estate transactions. She has also served in state government, including as Executive Director of the Indiana State Lottery Commission and State of Indiana Budget Director.

Chair of the Celanese Nominating and Corporate Governance Committee
Member of the Celanese Compensation and Management Development Committee

william m. brownd

william m. brown

Mr. Brown is Chairman of the Board, President and Chief Executive Officer of Harris Corporation, an international communications and information technology company. Mr. Brown joined Harris in November 2011 as President and Chief Executive Officer and was appointed Chairman in April 2014. Prior to joining Harris, Mr. Brown was Senior Vice President, Corporate Strategy and Development, of United Technologies Corporation (“UTC”). He also served five years as President of UTC’s Fire & Security Division. In total, Mr. Brown spent 14 years with UTC, holding U.S. and international roles at various divisions, including Carrier Corporation’s Asia Pacific Operations and the Carrier Transicold division. Before joining UTC in 1997, he worked for McKinsey & Company as a senior engagement manager. He began his career as a project engineer at Air Products and Chemicals, Inc. Mr. Brown serves on the board of directors of the Fire Department of NYC Foundation and the board of trustees of both the Florida Institute of Technology and the Florida Polytechnic University.

Member of the Celanese Audit Committee
Member of the Celanese Environmental, Health, Safety, Quality and Public Policy Committee

edward g. galanted

edward g. galante

Mr. Galante served as Senior Vice President and as a member of the management committee of Exxon Mobil Corporation, an international oil and gas company, from August 2001 until his retirement in 2006. Prior to that, he held various management positions of increasing responsibility during his more than 30 years with Exxon Mobil Corporation, including serving as Executive Vice President of ExxonMobil Chemical Company from 1999 to 2001. Mr. Galante currently serves as a director (since 2007), chairman of the compensation and management development committee and as a member of the governance and nominating committee and the technology, safety and sustainability committee of Praxair, Inc. He also serves as a director (since 2010) and chairman of the governance committee of Clean Harbors, Inc. He also serves as a director (since 2016) and member of the compensation committee and the environmental, health, safety and security committee of Tesoro Corporation. From 2008 until November 2014, Mr. Galante served as a member of the board of directors of Foster Wheeler AG, which included service on Foster Wheeler's compensation and executive development committee (including as chairman) and audit committee.

Member of the Celanese Nominating and Corporate Governance Committee
Member of the Celanese Compensation and Management Development Committee

kathryn m. hilld

kathryn m. hill

Ms. Hill served in a number of positions at Cisco Systems, Inc. from 1997 to 2013, including, among others, as Executive Advisor from 2011 to 2013, Senior Vice President, Development Strategy and Operations from 2009 to 2011, Senior Vice President, Access Networking and Services Group from 2008 to 2009, and Senior Vice President, Ethernet Systems and Wireless Technology Group from 2005 to 2008. Cisco designs, manufactures and sells Internet Protocol (IP)-based networking and other products related to the communications and information technology industry and provides services associated with these products. Prior to joining Cisco, Ms. Hill had a number of engineering roles at various technology companies. Ms. Hill has served as a member of the board of directors of Moody’s Corporation, a provider of (i) credit ratings, (ii) credit, capital markets and economic related research, data and analytical tools, (iii) software solutions and related risk management services, (iv) quantitative credit risk measures, financial services training and certification services and (v) outsourced research and analytical services to financial institution customers, since May 2011, including currently serving as the chair of the compensation and human resources committee and as a member of the audit committee and the governance and nominating committee. She also currently serves as a member of the board of directors (since 2013) and as a member of the audit committee and the compensation committee of NetApp, Inc. Ms. Hill is a member of the Board of Trustees for the Anita Borg Institute for Women and Technology.

Chair of the Celanese Compensation and Management Development Committee
Member of the Celanese Environmental, Health, Safety, Quality and Public Policy Committee

david f. hoffmeisterd

david f. hoffmeister

Mr. Hoffmeister served as the Senior Vice President and Chief Financial Officer of Life Technologies Corporation, a global life sciences company, prior to its acquisition by Fisher Scientific Inc. in February 2014. From October 2004 to November 2008, he served as Chief Financial Officer of Invitrogen Corporation, which merged with Applied Biosystems in November 2008 to form Life Technologies Corporation. Before joining Invitrogen, Mr. Hoffmeister spent 20 years with McKinsey & Company as a senior partner serving clients in the healthcare, private equity and chemical industries on issues of strategy and organization. From 1998 to 2003, Mr. Hoffmeister was the leader of McKinsey’s North American chemical practice. Mr. Hoffmeister serves as a director of Glaukos Corporation (since 2014) and member of the audit committee.

Member of the Celanese Audit Committee
Member of the Celanese Nominating and Corporate Governance Committee

jay v. ihlenfeldd

jay v. ihlenfeld

From 2006 until his retirement in 2012, Mr. Ihlenfeld served as the Senior Vice President, Asia Pacific, for 3M Company, a leader in technology and innovation. Mr. Ihlenfeld previously served as 3M Company’s Senior Vice President, Research and Development from 2002 to 2006. A 33-year veteran of 3M Company, Mr. Ihlenfeld has also held various leadership and technology positions, including Vice President of its Performance Materials business and Executive Vice President of its Sumitomo/3M business in Japan. Mr. Ihlenfeld serves as a director and member of the personnel and compensation committee and the environmental, health, safety and product compliance committee (since 2017) of Ashland Global Holdings, Inc.

Member of the Celanese Compensation and Management Development Committee 
Chair of the Celanese Environmental, Health, Safety, Quality and Public Policy Committee

mark c. rohrd

mark c. rohr

Mr. Rohr was appointed Executive Chairman of Celanese in May 2019, following his tenure as Chairman, President and Chief Executive Officer since April 2012. He has been a member of our board of directors since April 2007. Prior to joining the Company, Mr. Rohr was Executive Chairman and a director of Albemarle Corporation, a global developer, manufacturer and marketer of highly engineered specialty chemicals. During his 11 years with Albemarle, he held various executive positions, including Chairman and Chief Executive Officer. Earlier in his career, Mr. Rohr held executive leadership roles with various companies, including Occidental Chemical Corporation and The Dow Chemical Company. Mr. Rohr has served on the board of directors of Ashland Global Holdings Inc. (f/k/a Ashland Inc.) since 2008, and currently serves as a member of its audit committee and its environmental, health & safety committee. In 2016, he also served as Chairman of the American Chemistry Council’s Executive Committee and as Chairman of the International Council of Chemical Associations.

kim k.w. ruckerd

kim k.w. rucker

Kim Rucker is an accomplished executive, holding senior leadership positions since 2004. Most recently, EVP, General Counsel & Secretary of Andeavor, a Fortune 100 company. She has held similar top leadership roles at Kraft (Kraft-Heinz) and Avon. Kim serves on the Board of Directors of Lennox International Inc. a $3.8 billion global company, Marathon Petroleum Corporation, a premier U.S. refining, marketing, and midstream company with a nationwide footprint, and the Board of Trustees of Johns Hopkins Medicine, an $8 billion nonprofit. She has been described as "an extraordinary strategic leader," with a passion for developing people to perform their best and driving business results. Kim is focused and has a sense of purpose and enthusiasm that she infuses in those around her. Kim has numerous recognitions and awards for her achievements. She is a sought-after speaker on a variety of topics including corporate governance, corporate reputation, leadership, ethics and compliance and managing for value, and she has authored many articles and a book chapter. Kim holds a JD from Harvard Law School and a Master in Public Policy from the John F. Kennedy School of Government at Harvard. She was raised in the Chicago area, and lives in San Antonio with her husband and two children.

Member of the Celanese Audit Committee
Member of the Celanese Environmental, Health, Safety, Quality and Public Policy Committee

lori j. ryerkerkd

lori j. ryerkerk

Lori J. Ryerkerk is the Chief Executive Officer of Celanese Corporation, a Fortune 500 global chemical and specialty materials company based in Dallas, Texas. Celanese is a leader in the development and production of materials used in most major industrial and consumer applications. Ryerkerk was named as CEO, as well as a member of the board of directors, in May 2019.

Previously, Ryerkerk was the Executive Vice President of Global Manufacturing, the largest business in Shell Downstream Inc. She led a team of 30,000 employees and contractors at refineries and chemical sites worldwide.

Ryerkerk’s expertise in the energy industry spans three-plus decades. She combines deep technical and commercial skills with a passion for the manufacturing business. Her unwavering focus on safety, environmental and social performance is the foundation on which she has overseen some of the most technically complex operations in the industry.

Ryerkerk joined Shell in May 2010 as the Regional Vice President of Manufacturing in Europe and Africa, and was responsible for the operation of five Shell Manufacturing facilities and five joint ventures. During that time, she improved operational performance of all assets in the region. In October 2013, she was named Executive Vice President of Global Manufacturing, Shell Downstream Inc.

Before joining Shell, she was Senior Vice President, Refining, Supply and Terminals at Hess Corporation, where she was responsible for two refineries, 21 terminals (and distribution network) and supply and trading.

Prior to that, Ryerkerk spent 24 years with ExxonMobil where she started her career as a process technologist at a refinery in Baton Rouge, Louisiana. Throughout her tenure at ExxonMobil, she took on a variety of operational and senior leadership roles in Refining and Chemicals Manufacturing, Power Generation, and various other groups including Supply, Economics and Planning, HSSE, and Public Affairs/Government Relations. Those assignments took her across the globe, from the U.S. to Europe to Asia.

Ryerkerk is a graduate of Iowa State University, where she completed her Chemical Engineering degree. She serves on the Axalta Board of Directors, a leading provider of liquid and powder coatings. Additionally, she actively supports a variety of organizations in her hometown of Beaumont, Texas.

john k. wulffd

john k. wulff

Mr. Wulff is the former Chairman of the board of directors of Hercules Incorporated, a specialty chemicals company, a position he held from July 2003 until Ashland Inc.’s acquisition of Hercules in November 2008. Prior to that time, he served as a member of the Financial Accounting Standards Board from July 2001 until June 2003. Mr. Wulff was previously Chief Financial Officer of Union Carbide Corporation, a chemical and polymers company, from 1996 to 2001. During his fourteen years at Union Carbide, he also served as Vice President and Principal Accounting Officer from January 1989 to December 1995 and Controller from July 1987 to January 1989. Mr. Wulff was also a partner of KPMG LLP and predecessor firms from 1977 to 1987. Mr. Wulff is currently the chairman of the audit committee, a member of the environmental, health and safety committee and a member of the board of directors of Chemtura Corporation (since October 2009). In May 2016, Ms. Wulff joined the board of directors of Atlas Worldwide Holdings, Inc., a leading global provider of outsourced aircraft and aviation operating services. He currently serves as a member of Atlas’ audit committee. He previously served as a member of the board of directors, the chairman of the governance and compensation committee and as a member of the audit committee of Moody’s Corporation. Mr. Wulff served as a director of Sunoco, Inc. from March 2004 until October 2012 when Sunoco was acquired by Energy Transfer Partners L.P.

Chair of the Celanese Audit Committee
Member of the Celanese Nominating and Corporate Governance Committee

Committee Membership

Audit Committee Compensation and Management Development Committee Nominating and Corporate Governance Committee Environmental, Health, Safety, Quality and Public Policy Committee
Jean S. Blackwell
William M. Brown
Edward G. Galante
Kathryn M. Hill
David F. Hoffmeister
Jay V. Ihlenfeld
Kim K.W. Rucker
John K. Wulff
= Chairman     = Member

Contact the Board

The board of directors has adopted the following procedure in accordance with the requirements of the NYSE and the SEC for stockholders or other interested parties to communicate with the board and its members. Stockholders and other parties interested in communicating directly with the non-management directors as a group, an individual director or the board may do so by sending their communications to:

Celanese Corporation
Board of Directors
222 W. Las Colinas Blvd., Suite 900N
Irving, Texas 75039
Attn: Corporate Secretary

All communications received by the Corporate Secretary will be delivered to one or more members of the board as appropriate, as determined by the Corporate Secretary. Notwithstanding the foregoing, the Corporate Secretary will maintain for the benefit of the board for a period of two years following the receipt of any communication, a record of all communications received in compliance with this policy.

Members of the board may review this record of communications upon their request to the Corporate Secretary. In addition, the receipt of any accounting, internal controls or audit-related complaints or concerns will be directed to the Chairman of the audit committee.