Meet Our Global Accounts Team

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Justin Clarke
Global Accounts Manager
Food & Beverage
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Justin Clarke

Justin began his career with Stonhard in 2014 as a Territory Manager in Charlotte, North Carolina. Two years later, he took on the role of an Architecture, Design, & Engineering (AD&E) representative for the Carolinas. Justin was named AD&E Representative of the Year in both 2018 and 2022. Today, he serves as a Global Accounts Manager focused on the food & beverage industry.

Justin holds a Bachelor of Applied Science from Western Carolina University.

He supports Habitat for Humanity and St. Jude Children's Research Hospital.

Find Justin on LinkedIn

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John Fournier
Global Accounts Manager
Pharmaceutical
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John Fournier

John began his career with Stonhard in 2013 as a Territory Manager for the Providence, Rhode Island area. In 2016, he took on the role of Area Manager for the New England region. Today, he serves Stonhard as a Global Accounts Manager, helping the world's largest pharmaceutical manufacturers realize their vision for their facilities.

John studied business at the University of Rhode Island and is a member of ISPE and AIA. He supports the ASPCA.

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Scott Garstka
Senior Director of Global Accounts
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Scott Garstka

Scott began his journey with Stonhard in 1998 as a Territory Manager in Springfield, Massachusetts. He later advanced to serve as the Architectural, Design, and Engineering Representative for New England, building strong relationships across the region.

In 2008, Scott transitioned to a Strategic Accounts role and, shortly after, assumed management responsibilities for the program, driven by his expertise and leadership.

Scott studied Economics at University of Massachusetts - Amherst and is a member of ISPE, CSI, and CDT.

Find me on LinkedIn

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Denny Highsmith
Global Accounts Manager
Partnerships
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Denny Highsmith

Denny joined Stonhard as a National Sales Manager in 2024 after 17 years in recruiting and account management. Today he serves as a Global Accounts Manager focused on partnerships.

Denny earned his Bachelor's degree in Strategic Communication from The Ohio State University.

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Brian Mahoney
Global Accounts Manager
Advanced Technology / Mission Critical
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Brian Mahoney

Brian has over 30 years of experience in project management and business development, including more than 16 years with Stonhard. Starting as a Territory Manager and now serving as a subject matter expert in the advanced technology manufacturing industry, Brian has developed extensive expertise in the semiconductor, data center, and EV sectors. His deep industry knowledge and problem-solving skills enable him to deliver safe, seamless, and long-lasting flooring and CRC solutions, making him a trusted solutions architect for this rapidly growing market.

Based in upstate New York, Brian works closely with customers, Stonhard’s local Territory Managers, construction management teams, and installation partners to ensure exceptional results.

He earned his Bachelor of Science in Business Marketing from SUNY Plattsburgh.

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T.J. Patruno
Global Accounts Manager
Food & Beverage
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T.J. Patruno

T.J. joined Stonhard in 2023 as a Global Accounts Manager, bringing over three decades of diverse expertise. His background spans Sales Leadership, Product Development, Customer Experience, Finance, and Corporate Strategy, making him a versatile and valuable asset to the team.

He holds Bachelor of Science degrees in both Business and Economics and an MBA from Florida State University.

Find T.J. on LinkedIn

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David Senn
Director of Global Accounts
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David Senn

David Senn has been a dedicated member of Stonhard since 2009, steadily advancing through key roles such as Territory Manager, National Account Manager, and Global Account Manager. Today, he serves as the Director of Global Accounts, bringing a wealth of experience and expertise to the position.

David holds a Bachelor of Science in Marketing from the University of Akron and an MBA from Kent State University.

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Mariana Aragón
Global Accounts Manager
Mexico
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Mariana Aragón

Mariana joined Stonhard in 2016 as a Commercial Territory Manager for Mexico. In 2019, she became a Field Sales Manager. Since 2023, Mariana has been serving as a Global Accounts Manager.

She has a Bachelor's degree in Interior Architecture and Design from Universidad Latinoamericana, S.C. and a Bachelor's degree in International Relations and Foreign Affairs from Universidad Nacional Autónoma de Mexico.

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Wiktor Dzioba
Global Accounts Manager
Food & Beverage - Europe
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Wiktor Dzioba

Wiktor joined Stonhard in 2011 as a Territory Manager for North Poland. Following this he held the positions of Sr. Territory Manager for Poland, followed by Key Account Manager for Central East Europe.

He now serves as a Global Accounts Manager for Europe focused on the food & beverage industry.

Wiktor earned his Faculty of Law degree from University Nicolaus Copernicus Torun. He is a supporter of Salesian Schools.

Find me on LinkedIn

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Bruno Fialho
Global Accounts Manager
Pharmaceutical - Europe
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Bruno Fialho

Bruno joined Stonhard in 2019 as an Architectural, Design, and Engineering Representative and has been serving as a Global Accounts Manager since 2022. In this role, he leads strategic engagement with multinational clients headquartered in Europe, ensuring their global standards are upheld across regions.

Acting as a vital link between Europe and large-scale projects worldwide—including in China, the US, Brazil, and beyond—Bruno combines strategic insight with hands-on coordination to support pharmaceutical manufacturers in achieving long-term operational excellence, regulatory compliance, and sustainability.

Bruno holds a Bachelor's degree in Marketing Management, an Executive Master's degree in Sales Management & Trade Marketing, and a Postgraduate degree in Digital Content Marketing. He is also an active member of ISPE.

Find me on LinkedIn



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