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Brian Chambers

Mr. Chambers is Board Chair, President, and Chief Executive Officer at Owens Corning. He was appointed CEO in 2019 and elected Chair in 2020. He previously served in a number of senior leadership roles at the Company, including President and Chief Operating Officer from 2018 to 2019, President of the Roofing business from 2014 to 2018, Vice President and General Manager of Roofing from 2013 to 2014, and Vice President and General Manager in the Composites business from 2011 to 2013. In total, Mr. Chambers has over 18 years of global business and leadership experience with Owens Corning. He also held several commercial and operational roles outside Owens Corning at Saint Gobain, Honeywell, and BOC Gases. 

Since February 2022, Mr. Chambers has served on the Board of Directors of Lincoln Electric Holdings, Inc., a world leader of engineering, design, and manufacturing of advanced arc welding solutions, automated joining, assembly and cutting systems, plasma and oxy-fuel cutting equipment, and is a member of its Audit and Finance Committees. Mr. Chambers is a member of the Business Roundtable, the Ohio Business Roundtable, and the Policy Advisory Board of the Joint Center for Housing Studies of Harvard University.

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Eduardo Cordeiro

Mr. Cordeiro served as Executive Vice President, Chief Financial Officer at Cabot Corporation, a global specialty chemicals and performance materials company, from 2009 to 2018. He also served as President of the Americas region from 2014 to 2018. During his 20-year tenure at Cabot Corporation, he held several corporate, business, and executive management positions, including Vice President of Corporate Strategy and General Manager of its Fumed Metal Oxides and Supermetals businesses. Prior to his career at Cabot, Mr. Cordeiro was a consultant with The Boston Consulting Group and a founding partner of The Economics Resource Group.

He has also served on the Board of Directors of FMC Corporation since 2011 and chaired its Audit Committee since 2014.


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Adrienne D. Elsner

Ms. Elsner currently serves as Chief Executive Officer of Benson Hill, Inc., a food technology company, since October 2023, as interim Chief Executive Officer from June 2023 to October 2023, and has served on the Board of Directors since 2019. She served as President, Chief Executive Officer, and Director of Charlotte’s Web Holdings, Inc., a leader in hemp-derived CBD extract products, from 2019 to 2021. From 2015 to 2018, she served as President, U.S. Snacks, Kellogg Company, a manufacturer, and marketer of convenience foods. From 1992 to 2015, Ms. Elsner served in a number of increasingly senior positions, including Executive Vice President, Chief Marketing Officer with Kraft Foods, Inc., a multinational confectionery, food and beverage conglomerate. She has also previously served on the board of the Ad Council.

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Alfred E. Festa

Mr. Festa serves as an Operating Advisor at Clayton, Dubilier & Rice, a global private equity firm with a broad portfolio. Mr. Festa served as Chairman and Chief Executive Officer of W.R. Grace & Co., a leading global producer of specialty chemicals and materials, from 2008 to 2018, and non-executive Chairman from 2018 to 2019. He joined the company as President and Chief Operating Officer in 2003 and assumed the role of CEO in 2005. Previously, he served in senior leadership positions at Morgenthaler Private Equity Partners and AlliedSignal (now Honeywell). He began his career at General Electric, where he spent 12 years in financial management positions.


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Edward F. Lonergan

Mr. Lonergan has served as Executive Chairman of Zep Inc., an international provider of maintenance and cleaning solutions to the commercial, industrial, institutional, and consumer markets since 2015. He served as Chairman and interim Chief Executive Officer from 2016 to 2017. Prior to joining Zep Inc., Mr. Lonergan served as Director, President, and Chief Executive Officer of Chiquita Brands International, Inc., a leading international grower, distributor, and marketer of fresh and value-added food products from 2012 until the privatization of the company in 2015. He served as Director, President, and Chief Executive Officer of Diversey, Inc., a leading global provider of sustainable cleaning, sanitation, and hygiene solutions, from 2006 through the sale of the company to Sealed Air Corporation in 2011. Prior to Diversey, Mr. Lonergan served as President, Europe for Gillette from 2002 to 2006. Between 1981 and 2002, he held a variety of leadership positions both domestically and internationally at the Procter & Gamble Company, including general management roles in customer business development and in emerging markets. He was Chairman of DRB Systems, Inc. until its sale in 2021 and was a Board member of The Schwan Food Company from 2014 through its sale in 2019.

He also serves as a Senior Advisor at New Mountain Capital.


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Maryann T. Mannen

Ms. Mannen currently serves as Executive Vice President and Chief Financial Officer of Marathon Petroleum Corporation, a leading, integrated, downstream energy company. From 2017 to January 2021 she was the Executive Vice President and Chief Financial Officer of TechnipFMC (a successor to FMC Technologies, Inc.), a global leader in subsea, onshore/offshore, and surface projects for the energy industry. From 2014 to 2017, she served as Executive Vice President and Chief Financial Officer of FMC Technologies, Inc. Previously, Ms. Mannen served in several roles of increasing importance at FMC including Senior Vice President and Chief Financial Officer. Prior to joining FMC in 1986, Ms. Mannen served as Finance Manager for Sheller-Globe Corporation.

She currently serves on the Board of Directors of MPLX LP, a diversified, large-capital master limited partnership formed by Marathon Petroleum Corporation that owns and operates midstream energy infrastructure and logistics assets, and provides fuels distribution services.

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Paul E. Martin

Mr. Martin served as Senior Vice President and Chief Information Officer for Baxter International Inc., a multinational health care company, from 2011 to 2020. Prior to that, he served as Chief Information Officer for Rexam plc (“Rexam”), a consumer packaging manufacturing company based in the U.K., where he held several key senior management positions, including head of information technology for American National Can Group Inc. (acquired by Rexam). Prior to his career at Rexam, Mr. Martin held information technology leadership positions at the CIT Group Inc., BNSF Railway Company, and Frito-Lay, Inc. 

Since 2017, Mr. Martin has served on the Board of Directors of Unisys Corporation and is currently a member of its Audit and Finance Committees as well as the Chair of the Security and Risk Committee. He joined the Board of Directors of Ping Identity Holding Corp., a provider of federated identity management and self-hosted identity access management solutions to web identities and single sign-on solutions in 2021 and is currently a member of its Audit Committee. Also in 2021, Mr. Martin joined the Board of Directors of STERIS plc., a leading provider of infection prevention and other procedural products and services, and is a member of the Compliance and Technology and Compensation and Organization Development Committees.

Mr. Martin received the 2020 Chicago CIO of the Year Leadership ORBIE Award. In 2017, he was selected to the CIO Hall of Fame by CIO Magazine for IT innovation and business leadership and was recognized in Black Enterprise’s 2017 Most Powerful Executives in Corporate America. In 2014, Mr. Martin was listed among the “100 Diverse Corporate Leaders in STEM” by STEMconnector and has been recognized as a Business Leader of Color by Chicago United.

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W. Howard Morris

Mr. Morris has been President and Chief Investment Officer of The Prairie & Tireman Group, an investment partnership, since 1998. Mr. Morris was formerly Emergency Financial Manager, Inkster, Michigan Public Schools, from 2002 to 2005, and Chief Financial Officer, Detroit, Michigan Public School District, from 1999 to 2000. He is a Certified Public Accountant and Chartered Financial Analyst.

Since 2021, Mr. Morris has been a member of the Board of Directors of Virtus Investment Partners, Inc. (“Virtus”), which is a publicly traded firm providing investment management and related services to individuals and institutions through independent managers using distinct investment strategies. Mr. Morris is a member of the Audit Committee of the Virtus Board of Directors.


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Suzanne P. Nimocks

Ms. Nimocks was formerly a Director (Senior Partner) with McKinsey & Company, a global management consulting firm, from June 1999 to March 2010, and was with the firm in various capacities since 1989, including as leader of the firm’s Global Organization Practice, Risk Management Practice, and Oil and Gas Electric Power and Renewables (wind, solar, geothermal) Practice. Ms. Nimocks served on several of the firm’s worldwide personnel committees and formerly served as the Houston Office Manager.

Ms. Nimocks has a variety of board leadership experience across industries and geographies. Since 2011, she has served on the board of ArcelorMittal, one of the world’s leading steel and mining companies, and is a member of its Appointments, Remuneration, Corporate Governance and Sustainability Committee. Since 2010, she has served on the board of Ovintiv, Inc, a leading North American hydrocarbon exploration and production company, where she chairs the Corporate Responsibility and Governance Committee and is a member of the Audit Committee. She also previously chaired its Human Resources and Compensation Committee. Beginning in 2010 and until 2021, Ms. Nimocks served as a director and chaired the Compensation Committee at Valaris plc., an offshore drilling and well drilling company and chaired the Environment Health and Safety Committee and Compensation Committee at its predecessor, Rowan Drilling Companies. She currently serves on the Global Advisory Board for Advancing Women Executives.


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John D. Williams

Mr. Williams has served as President and Chief Executive Officer of Domtar Corporation (“Domtar”), a manufacturer of fiber-based products including communication papers, specialty and packaging papers and absorbent hygiene products, since joining the company in 2009. He also served as a member of Domtar’s Board of Directors until Domtar’s sale in 2021. From 2000 to 2008, Mr. Williams served in senior executive positions with SCA Packaging Ltd. and SCA Packaging Europe, which is among Europe’s largest producers of containerboard paper used for the manufacturing of corrugated box products. From 2005 to 2008, he served as President of SCA Packaging Europe, and as regional managing director for the company’s U.K. and Ireland operations from 2000 to 2005. Prior to joining SCA Packaging, Mr. Williams held a number of increasingly senior positions in sales, marketing, management, and operations with Rexam PLC; Packaging Resources, Inc.; Huhtamaki; Alberto Culver (U.K.) Ltd.; and MARS Group.

Since April 2018, Mr. Williams has been a director of Form Technologies, Inc., a privately-held leading global group of precision component manufacturers, based in Charlotte, North Carolina; he has been also non-executive chair of the Board of Directors since January 2019.

Our executive leadership team guides our global enterprise with a rich mix of backgrounds and perspectives. To learn more about our Corporate Governance, please visit our Investors site.