Leadership

President and Chief Executive Officer

Michael Stubblefield is our President and CEO, a position he has held since May 2014. Prior to assuming his current position, Mr. Stubblefield served as a Senior Expert for Chemicals Practice of McKinsey & Company from 2013 to 2014. Prior to this role, Mr. Stubblefield held a variety of roles at Celanese Corporation from 1994 to 2012, including Vice President and General Manager, Advanced Engineered Materials and Chief Marketing Officer. Mr. Stubblefield currently serves on the board of directors of Ingersoll Rand Inc. He earned a bachelor’s degree in chemical engineering from the University of Utah, as well as an MBA from Texas A&M University-Corpus Christi.

Executive Vice President and Chief Financial Officer

Thomas A. Szlosek is Avantor’s Executive Vice President and Chief Financial Officer. As CFO, Mr. Szlosek oversees: Accounting; Business Support; Financial Planning and Analysis; Treasury; M&A; Investor Relations; Internal Audit; and Tax Functions at Avantor. He joined Avantor in December 2018, prior to which he spent 14 years with Honeywell, including the last five years as Chief Financial Officer. Mr. Szlosek also spent eight years with GE Corporation, including three years as the CFO for GE Medical Systems, based in Asia, and two years as the CFO for GE Consumer Finance, based in Ireland. Mr. Szlosek currently serves on the board of directors of RXO as well as Janus International Group where he chairs the Audit Committee for each. He is a Certified Public Accountant and graduated from The State University of New York at Geneseo.

Executive Vice President, Americas

James Bramwell is our Executive Vice President, Americas. Mr. Bramwell is responsible for our Americas and global Strategic Partners commercial organizations. He is also responsible for our global Avantor Services business, supporting customer operations with our full suite of services including: lab and production services; procurement and sourcing services; clinical and biorepository services; and commercial kitting services.​​​​​​​ Prior to assuming his current position, Mr. Bramwell served as VWR’s Senior Vice President, Strategic Partners, a position he held from June 2008 to November 2017. During his tenure, he served in several roles at VWR, including Area Vice President of the Southwest U.S. and Mexico and Vice President of Major Accounts. Mr. Bramwell was one of the founding members of the Avantor Foundation and served in various roles including Board Member, President and is now part of the Advisory Board. Mr. Bramwell earned a bachelor’s degree in business management from Brigham Young University.

Executive Vice President, Biopharma Production

Dr. Ger Brophy is our Executive Vice President, Biopharma Production. In his current role, Dr. Brophy is responsible for developing and implementing our Biopharma Production offering to support the current and future needs of our customers. Prior to joining Avantor, Dr. Brophy held a variety of research and development, strategy, advanced systems, and business development positions with GE Healthcare Life Sciences, GE Healthcare Medical Diagnostics and Amersham for nearly 30 years. Dr. Brophy earned a Bachelor of Science in biotechnology, as well as a doctorate in molecular biology from Dublin City University in Ireland.

Executive Vice President, AMEA

Christophe Couturier is our Executive Vice President, AMEA. He has extensive strategic leadership experience in the life sciences industry. Mr. Couturier leads sales, marketing and customer service for our business in AMEA, as well as the Avantor Business System and its associated LEAN processes globally. Prior to this role, Mr. Couturier was the Executive Vice President, Services. Before joining Avantor, Mr. Couturier led business areas of services, merger integration, general management, finance and consulting at life sciences companies, including more than a decade with MilliporeSigma. He earned a Master of Science in management from ESSEC Business School in France.

Executive Vice President and Chief Human Resources Officer

Meghan Henson is our Executive Vice President and Chief Human Resources Officer (CHRO). Ms. Henson is responsible for all aspects of our Company’s global human resources organization, including compensation and benefits, learning, talent development, workforce management and employee relations. She joined Avantor in January 2021, prior to which she served as CHRO for both XPO Logistics and Chubb Insurance. Earlier in her career she held various HR leadership roles at PepsiCo and was a management consultant at Deloitte and Willis Towers Watson. Ms. Henson was also a William Davidson Institute Fellow at Vietnam National Coal Corporation in Hanoi. She also served as an instructor at ACTY English School in Kyoto, Japan and Jinan University in Guangzhou, China. Ms. Henson currently serves on the board of directors for MamaMancini’s Holdings. She earned an MBA and master’s degree in public policy from University of Michigan and a bachelor’s degree in East Asian studies and political science from University of Wisconsin-Madison.

Senior Vice President, Global Communications and Brand

Allison Hosak is our Senior Vice President, Global Communications and Brand. She is responsible for executive, employee and change communications, public relations / affairs, crisis communications, corporate identity and brand, corporate social responsibility / sustainability and strategic marketing communications. Over her tenure with the Company, she has helped foster Avantor’s growth and prominence as a global leader in life sciences. She has built an integrated communications and center of excellence organization from the ground up, executed three corporate rebrands, and supported multiple integrations and mergers. Ms. Hosak also led communications and branding for Avantor’s initial public offering (IPO) in May 2019. She earned an MBA in marketing from Lehigh University and Bachelor of Science in business administration – marketing with a minor in public relations from Kutztown University.

Executive Vice President, Global Supply Chain

Sheri Lewis is our Executive Vice President, Global Supply Chain. Ms. Lewis is globally responsible for all aspects of distribution operations, supply management, supply chain, transportation, and inventory optimization. She joined Avantor in January 2021, prior to which she served in senior supply chain operations roles at Medtronic, including Vice President, Global Operations for the Minimally Invasive Therapies Group. She also served as Vice President of Global Supply Chain, Distribution and Logistics for all of Medtronic, with a focus on transformation and bringing forward the Integrated Business Planning Process (IBP). Prior to that, Ms. Lewis served in various leadership roles with Honeywell’s Aerospace Integrated Supply Chain organization. She earned a bachelor’s degree in organizational management from Concordia University. She also completed the Leading Global Businesses Program at Harvard Business School.

Executive Vice President, General Counsel and Secretary

Justin Miller is our Executive Vice President, General Counsel. In his current role, Mr. Miller leads our global Legal organization. Prior to assuming his current position, Mr. Miller served as an attorney at Ballard, Spahr, LLP, an American Lawyer top 100 firm. Mr. Miller also spent 20 years in various leadership positions at DuPont, most recently as Associate General Counsel and Chief Litigation Counsel. In addition to his background in securities and corporate governance, he has extensive commercial experience in pharmaceuticals, electronic materials, and biotechnology. Mr. Miller earned a bachelor’s degree in political science from University of Pennsylvania and a Juris Doctor degree from George Mason University School of Law in the United States.

Executive Vice President, Strategy and Corporate Development

Kitty Sahin is our Executive Vice President, Strategy and Corporate Development. At Avantor, Ms. Sahin is responsible for shaping and executing the company’s growth strategy and leading merger and acquisition efforts to enhance the company’s capabilities and accelerate growth. Ms. Sahin came to Avantor following 20 years in corporate strategy and business development roles, having spearheaded successful enterprise growth projects at global organizations across the life sciences, pharmaceutical, and medical technology spaces. Prior to joining Avantor, Ms. Sahin most recently served as EVP, Strategy and Business Development at Novanta. She has held senior-level strategy and corporate development positions at Thermo Fisher, Covidien, and Charles River Laboratories, as well as roles at Corning and Bain & Company earlier in her career. Ms. Sahin earned a Master of Business Administration from The Wharton School at the University of Pennsylvania and a Bachelor of Arts from Yale University.

Executive Vice President, Europe

Frederic Vanderhaegen is our Executive Vice President, Europe. He has a tenured background in strategic leadership in the life sciences, biopharmaceutical, medical device and research industries. Mr. Vanderhaegen leads our sales, marketing and customer service functions in both the Americas and Europe regions, as well as our global Sourcing and Laboratory Products Groups focused on solution-selling for critical workflows. Prior to joining Avantor, Mr. Vanderhaegen held leadership positions in organizations within the biopharma and life sciences industries, including Beckman Coulter, Tecan Group and MilliporeSigma. Most recently, he served as Vice President and General Manager, Europe, Middle East & Africa at Ortho-Clinical Diagnostics, leading sales and services. Mr. Vanderhaegen earned an MBA from The Open University Business School and also holds engineering degrees in biochemistry and chemical engineering.

Executive Vice President and Chief Information Officer

Mike Wondrasch is our Executive Vice President and Chief Information Officer. In his current role, Mr. Wondrasch is responsible for all aspects of our Company’s global information and digital technology, including e-commerce, digital marketing and cyber security. Prior to joining Avantor, Mr. Wondrasch led IT organizations at Fortune 100 companies, including PepsiCo, AmerisourceBergen and Mars. Most recently, he served as Global Chief Technology Officer for Bunge, a leading agribusiness and food company. He holds a Bachelor of Science in computer science from Villanova University in the United States and a Master of Science in computer engineering from the University of Pennsylvania.