Chief Executive Officer

John-Paul Savant

Appointed: 2016

John-Paul joined ATG as CEO in February 2016, bringing over 18 years of experience in digital marketplaces and commerce.  He spent 10 years at eBay, where he served in a number of leadership roles, latterly as PayPal’s VP of Product, Experience, and Consumer Engagement for EMEA.  At PayPal, he was part of a leadership team that built the EMEA business from $30m in revenue to over $1.8 billion.  He also held leadership roles at other online businesses.  John-Paul began his career at JPMorgan in New York City after graduating from Georgetown University in Washington DC.  He earned his MBA at the University of Chicago.  A native San Franciscan, he has lived and worked in London for the last 15 years.

John-Paul is passionate about the role ATG can play in accelerating the circular economy through digital transformation of the traditional auction industry.  His focus is on finding creative strategies to pursue amidst the structural shift from offline to online and on building focused, collaborative leadership teams with the capabilities to execute.

Committees: Disclosure Committee (Chair)

Chief Financial Officer

Tom Hargreaves

Appointed: 2018

Tom joined ATG in January 2018 as Group CFO. He joined from Yell, where, as CFO, he was a key member of the leadership team who led their digital transformation.

Prior to this Tom worked at Vodafone in the UK and across EMEA before becoming CFO of Vodafone Romania. In all, Tom has 10 years’ CFO experience, trained with Arthur Anderson, is a qualified Chartered Accountant and holds an MBA.

Tom is passionate about driving strategic transformation and building top-tier international teams, with extensive experience of both M&A and business funding.

Committees: Disclosure Committee, Sustainability & ESG Committee

Chief Operating Officer

Richard Lewis

Appointed: 2000

Richard has been COO at ATG since 2012. He was part of the leadership team who led the launch of Live Bidding in 2006, the acquisition of in 2013 and in 2018.

Prior to becoming COO, Richard joined ATG as Marketing Director in 2000. He has since played a key role in bringing auctioneering online and driving the next evolution of the industry. A true voice of the industry, Richard was admitted to the Worshipful Company of Arts Scholars in 2017.

Richard is passionate about the future of auctioneering and the technical intricacies supporting every aspect of this vision.

Richard chairs ATG's Sustainability & ESG Committee.

President of North America

Jeremy Stewart

Jeremy is President of ATG’s Industrial and Commercial (I&C) division in North America. He joined ATG in 2022 and is responsible for advancing the I&C business and delivering incremental value to ATG customers while bringing together an exciting pipeline of innovations. 

Jeremy has extensive experience at two-sided digital marketplaces, previously serving as President, Supply & Operations at, where he oversaw the company’s provider network and operations teams. Prior to that, he served as President of Angie’s List (now Angi), overseeing the Angie’s List and HomeStars marketplaces as well as the mHelpDesk field service management product. Before that, Jeremy had various roles at IAC Inc, overseeing the Angie’s List and HomeAdvisor merger and holding roles in Financial Planning & Analysis. He began his career in finance and strategy at Intel Corporation. 

Jeremy is passionate about advancing the online auction eco-system, enabling auctioneers and their consignors to maximise the value of their secondary assets and ensuring ATG equips auctioneers with the digital tools they need. 

Jeremy received both his BA and his MBA from Indiana University. He is now based in New York. 

Chief Technology Officer

Pratyush Rai

Appointed: 2022

Pratyush Rai has over 20 years of technology experience and joined ATG in 2022 from Kaplan North America, a global education and training services provider. As CTO at Kaplan, he oversaw the merger of three companies into a new consolidated team and platform, and built a reputation for creating an innovative, aligned, collaborative, and results oriented tech team with high on-time delivery rates. Pratyush has also held leadership positions at Macmillan New ventures, NBCUniversal and Amazon.  

Pratyush is passionate about building user impact in collaboration with a strong product offering. He has a Masters in Computer Science from Syracuse University and an MBA from New York University. Pratyush is based in New York. 

Chief Product Officer

Meghan Schoen

Meghan brings over 14 years of leading teams, with deep product and marketing expertise, joining most recently from Shutterstock, a global two-sided marketplace and the world’s largest marketplace for digital content. As CPO, she built and led the product, design, product marketing, and research disciplines, executing against a vision to transform Shutterstock into a creative platform with diversified revenue streams. Meghan also led their AI strategy to unlock efficiencies for suppliers and capabilities for buyers.

Chief People Officer

Darren Ali

Appointed: 2022

Darren Ali joined ATG as Chief People Officer in 2022, bringing a wide range of international experience, having worked in Singapore, New York, Budapest and the UK. He has previously held roles at firms including Calypso Technology (Adenza), BlackRock and Royal Bank of Scotland Group, and has a strong track record of fostering high-quality employee experience and culture and supporting colleagues through M&A processes. Darren is based in London.  

While relatively new to the auction industry, he is excited about the role people at ATG can play in reinventing auctioneering and is passionate about building cultures, diversity & inclusion and creating defining career moments for people.

Senior Vice President, Corporate Development

Marika Clemow

Appointed: 2010

Marika began her ATG career in 2010 and has held roles across commercial, operational and technical departments. She joined the executive team in 2017 as the Global Director of Product and Operations, responsible for product leadership and development cadence alongside the unification of operational processes globally. Marika has been fundamental to the maturation of ATG’s North American business, leading the integration of Proxibid into the Group in 2020 and  playing a key role in the acquisition and integration of Auction Mobility the same year.

With over 15 years' experience in the auction industry, Marika is passionate about making auctions more accessible to consumers and end users through technological innovation. Her role in evolving ATG’s value added services to extend the auction ecosystem aims to enhance the value proposition for all stakeholders.

Marika was a finalist for the Everywoman Innovation and Sustainability Award in 2015 for innovations to The Saleroom, and in 2014 won the Antiques Young Guns Award in recognition of her contribution to the art and antiques industry. Marika has a Masters from the University of NSW, in her native Australia. She worked in ATG’s London headquarters for a decade and now resides in the United States.

Senior Vice President, Co-Head of Revenue North America

Dan Pennington

Appointed: 2011

Dan has been with ATG since 2011 occupying a variety of commercial leadership roles. Previously heading up the Industrial & Commercial Division in Europe, he relocated to the US in 2018 as Managing Director of

Having spent his entire career in technology and digital marketing, prior to ATG Dan worked in Cambridge, UK and Washington, D.C. for the American Association for the Advancement of Science (AAAS). There he specialized in aligning digital marketing campaigns with the strategic goals of multi-national scientific corporations throughout EMEA, APAC and North America.

Dan brings a deep understanding of eCommerce best practice and is committed to helping auctioneers optimize the online aspect of their business.

Senior Vice President, Engineering

Wyatt Barrett

Senior Vice President, Co-Head of Revenue North America

Erwin Hungerbuhler

Erwin began his LiveAuctioneers (now ATG) journey in 2007.  Over a 16 year span, Erwin developed and deployed sales, client success and account management strategies that consistently increase revenue growth.  This record of proven success attracted three progressive multi-million dollar investments in the live online auction / marketplace sector, including the recent acquisition by ATG.

Particularly passionate in building high-producing, high-morale sales and account management teams, achieving growth strategy and evolving the auction industry to become more effective by blending offline to online.

Erwin grew up in Switzerland and now resides in New York.

Vice President, White Labels and Emerging Value Added Services

Gilad Andorn

Gilad serves as the Head of NA New Revenue and SaaS at Auction Technology Group, a role he assumed following the LiveAuctioneers acquisition in 2021. Since joining ATG, Gilad has played a pivotal role in driving the company's growth and spearheading innovative initiatives within the North American market.

Before his tenure at ATG, Gilad held the position of Head of Finance, Payments, and HR at LiveAuctioneers. His professional background also includes venture capital experience, where he strategically invested in early-stage companies across Africa. During his time at Google, Gilad led pivotal strategy and operations initiatives for the B2B AdTech solutions, showcasing his versatility in the tech industry. His career began as a management consultant, providing a solid foundation for his subsequent leadership roles.

With an in-depth understanding of the auction market, Gilad brings a genuine passion for innovation to his leadership. He is dedicated to assembling a world-class team that prioritizes delivering tangible value to customers.

He is a graduate of the University of Chicago Booth School of Business and a former Army Captain.

Vice President, Seller Products

Val Dolejsi

Val Dolejsi joined ATG in October of 2023, and after leading the seller-focused product team for the past four months, now serves as senior product leader for the team. 

She has worked in the online technology space for almost 15 years, with experience in ecommerce, travel, and multiple marketplaces.  As part of the product team at Home Advisor, Val played a critical role in the merger with Angie’s List by leading the technical integration of the two platforms to realize the value of the integrated marketplaces.

Val resides in Denver and holds an MBA from the Carlson School of Management (University of Minnesota).

Managing Director, lot-tissimo

Kathrin Haase

Appointed: 2018

Kathrin joined ATG in June 2018 as General Manager of lot-tissimo. In April 2019, she took over the Managing Director position from lot-tissimo founder Jörg Wisniewski. Kathrin has more than 15 years experience in the Media Industry, working for Axel Springer and Bertelsmann/Gruner + Jahr. Having worked in digital business since the year 2000, driving digital business development and pushing forward digital transformation have always been at the core of her business activities, whether heading digital Platforms or leading international sales. Kathrin graduated from Hamburg University in International Management and Marketing. She also participated in the Bertelsmann University leadership programs with INSEAD and ESMT.

Vice President, North America Operations

Jessica Mizrachi

Jessica Mizrachi joined LiveAuctioneers in 2017 and has led operations for ATG North America since 2023. 

With over a decade of experience in the e-commerce/online auction space, she is passionate about creating best-in-class experiences for auction houses and bidders on the marketplaces. Prior to joining ATG, Jessica co-founded a C2C marketplace for art and collectibles, backed by Founders Fund, FJ Labs, and Acton Capital, that was acquired by Auction Mobility in 2016. 

Jessica resides in New York and holds a BA from Cornell University and an MA from Bard College.

Vice President, Global Marketing

Suzie Ryu

Suzie became VP Global Marketing of ATG in 2023, having served as VP of Marketing for ATG's North American Arts & Antiques marketplace LiveAuctioneers after joining the company in 2015.

Suzie has over 15 years of marketing experience in digital marketplaces specializing in verticals including building and construction, luxury fashion, and education, with extensive knowledge in audience development, CRM, database marketing and product marketing.

Suzie is passionate about empowering bidders and auctioneers with tools and technology that deliver value and create an auction experience that is seamless and delightful.

Suzie received her BA from New York University. She currently resides in New York.

Vice President, Engineering

James Willis

James brings over 25 years of software development expertise to ATG, having joined in 2022 from Clearcover, a unicorn insurtech startup.

His diverse background encompasses fintech, healthcare AI, and eGovernment, showcasing a track record of optimizing team performance, championing agile methodologies, and driving architectural transitions. With a deep commitment to excellence and a talent for fostering a culture of innovation, James continues to drive impactful change.

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