Leadership Team

Simon Bates

President and Chief Executive Officer

Simon Bates is GCP’s President and Chief Executive Officer. Prior to joining GCP, Simon was President of Oldcastle Infrastructure, a division of CRH plc. Oldcastle Infrastructure is a global business with more than 90 locations in Asia, Europe and North America. Simon has 25 years of building products and specialty chemicals experience with publicly traded companies, including roles as Senior Vice President for Building Products at Westlake Chemical and Axiall Corporation. Simon began his building products career in Europe joining Hanson plc in 1996. He held a variety of commercial roles before transferring to North America in 2002, where he had both commercial and operational roles before leading Hanson’s building products businesses in the western United States. Hanson was subsequently acquired by Heidelberg Cement in 2007.

Simon received a bachelor’s degree in Economics from the University of York in England. He also holds post graduate qualifications in Finance & Accounting and Marketing.

Craig Merrill

Chief Financial Officer

Craig Merrill is GCP’s Chief Financial Officer, Finance, Analytics and Strategy. Prior to becoming GCP’s CFO, Craig served as GCP’s Vice President, Global Marketing and Vice President & General Manager, Global Cement and Emerging Markets following the Company’s separation from W.R. Grace & Co. in 2016. At W.R. Grace & Co., he served as Vice President & General Manager in the Specialty Construction Chemicals division prior to the commencement of his service with GCP. Craig began his career at W.R. Grace & Co. in 1990. He has 30 years of experience in the global building products and specialty chemicals industries.

Craig received a Bachelor of Commerce degree from the University of Toronto.

Sherry Mennenga

Chief Human Resources Officer

Sherry Mennenga serves as GCP's Chief Human Resources Officer and is responsible for setting the HR strategy and driving proactive culture and talent initiatives within the organization. 

For over 20 years, Sherry has led numerous domestic and international change initiatives as a human capital executive as well as a consultant. Prior to joining GCP, Sherry founded and managed a boutique human capital consulting firm specializing in turnarounds, restructures, and integrations for private equity, public, and private ownership structures. Previous to this, Sherry held progressively responsible HR roles for Ryder System, Inc., Givaudan SA, and Smith & Nephew Plc. as an SVP of HR and Communications. 

Sherry received her master’s degree in Human and Organizational Development from Vanderbilt University.

Robyn Hooker McCall

Chief Information Officer

Robyn Hooker McCall serves as GCP’s Chief Information Officer.

In this role, she is responsible for the Information Technology strategy and oversees delivery of IT operations and business solutions across the enterprise. Robyn has 25 years of global technology experience in progressive IT management roles. Prior to joining GCP, she was Chief Information Officer for Birla Carbon, a global chemical manufacturing company, where she led the implementation of numerous global systems, upgrading the effectiveness of IT and realizing strategic benefits across the business. 

Robyn earned her Bachelor of Science degree in Industrial Engineering from the Georgia Institute of Technology.  

David Campos

President, SCC Americas

David comes to GCP with a proven track record of commercial success and revenue growth in several dynamic and global markets. Most recently serving as President of Canada and Chief Transformation Officer for Serta Simmons Bedding, his prior experience includes Kimberly Clark and McKinsey & Co. where he was focused on business transformation. David holds a master’s degree in Management from the Massachusetts Institute of Technology and a bachelor’s degree from the Universidad de los Andes in Columbia.

Michael W. Valente

Vice President, General Counsel and Secretary

Michael W. Valente leads GCP’s global legal team and oversees all aspects of legal strategy, corporate governance, compliance, commercial transactions, intellectual property, and government relations.

Michael previously held the role of Senior Vice President, General Counsel and Secretary at Versum Materials, Inc., a supplier of specialty chemicals, gases and equipment to the semiconductor industry. During his time at Versum, he completed its spin-off from Air Products and Chemicals, Inc. while setting the vision and leading the global legal, human resources and communications departments. Prior to Versum, Michael was Vice President and General Counsel of Rockwood Holdings, Inc., a leading supplier of specialty chemicals and advanced materials.

Michael earned his B.S. degree in accounting from Rider University, and Master and Doctorate degree from Seton Hall, and brings exceptional business expertise to GCP.  

Dr. Amy Randall

Vice President of Research, Engineering and Product Development

Dr. Amy Randall is GCP's Vice President of Research, Engineering and Product Development. Amy brings over 15 years of materials experience to GCP and previously served as Executive Director for Global Research, Development and Engineering for Firestone Building Products, an international commercial roofing supplier. Amy leads GCP’s innovation, product development, product marketing and portfolio development activities, guiding her team in support of both organic and acquisition initiatives. Amy brings significant technical and value creation expertise to GCP.

Amy obtained her B.S. degree in Chemical Engineering and Chemistry from the University of Minnesota and holds a PhD in Polymer Science from the University of Akron.