Speakers

International Executive with extensive general management, sales, operations and corporate development experience in financial technology, e-commerce and commodity/financial markets.

My current focus is on an e-commerce business navigating the landscape from the various platforms like Shopify and headless commerce solutions and all of the various associated services (UX, E-mail/SMS marketing, Customer journey and segmentation, SEO and Analytics, Payment options, e-commerce strategy). Furthermore, as an investor and manager, I have had a key role in all fund raising strategies and acquisition of partner relationship.

Guian began his professional career in 1992 as an Emerging Markets Trader at Société Générale, where he was responsible for opening new business lines in Central and Eastern Europe.

In 1996, he joined SPB Group, where he held various positions over 30 years until becoming the group’s General Manager in 1999. In 2012, he founded Save Store and combined the company’s development with his role at SPB Group until 2024. Since then, he has been focused on expanding the Save Store network, growing and diversifying the company’s B2B programs in France, Spain, and Poland, and promoting the circular economy and customer-oriented approach.

Guian has been living in Spain with his family since 2010. He speaks five languages and holds two master’s degrees: an MBA from HEC Paris and a Master’s in European Management from CEMS, The Global Alliance in Management Education.

Owain Griffiths is the founder and CEO of Grade Mobile, a UK-based mobile technology company established in 2014. Grade Mobile operates as a UK MVNO, a national Trade-in service provider, and a developer of proprietary reverse logistics systems that support the circular economy for mobile devices. The company also provides subscription-based mobile services and handles large-scale distribution and refurbishment.

With a background in compliance and governance, Owain holds a diploma in Corporate Governance and has applied this expertise to shaping the company’s internal structures, regulatory alignment, and operational framework. Under his leadership, Grade Mobile has expanded its footprint in the UK and European markets through strategic partnerships and technology-led solutions.

Dhananjay Choubey is an entrepreneur and sustainability advocate, leveraging over 15 years of experience in building and scaling businesses across the MENA region. As the co-founder of Revent, a trusted omnichannel platform for pre-owned electronics, Dhananjay is at the forefront of promoting circular economy principles in the electronics industry. Under his leadership, Revent has become a key player in reducing e-waste by extending the lifecycle of electronic devices, serving both consumers and businesses with sustainable tech solutions. Before founding Revent, Dhananjay held leadership roles at Noon, where he established and scaled a $30M annualized Recommerce business spanning the UAE, KSA, and Egypt. His expertise in creating sustainable, scalable business models has been recognized by prestigious programs like Techstars and Future 100 UAE. Dhananjay’s strategic vision, combined with his passion for addressing unstructured challenges, empowers SMEs to embed sustainability into their operations while achieving measurable impact. He holds a PGDM in Marketing from the Institute of Management Technology, Ghaziabad, and a BE in IT from the Birla Institute of Technology, Mesra.

Engineer • Supply Chain Expert • Entrepreneur

A seasoned engineer with over a decade of experience in the IT and telecom sectors, I specialize in supply chain management and operations. My extensive time living and working across the Far East has enabled me to forge strong global international partnerships—especially in China—that have been instrumental to my business success.

With expertise spanning product manufacturing, design, development, team leadership, and procurement, I excel at orchestrating cross-functional teams to drive innovation and efficient execution. My hands-on experience—from sourcing raw materials to delivering finished products—has consistently delivered value and competitive advantage for the organizations I lead.

I’m passionate about leveraging my unique blend of technical prowess, cultural insight, and entrepreneurial vision to build global supply chain ecosystems that scale intelligently and sustainably.

Alexander Thiele, a passionate advocate for sustainability in IT and a recognized leader in the circular economy space. Currently serving as Director Circular Services at Computacenter, Alexander brings over 20 years of experience from industry giants like Bechtle and Dell, where he has led transformative initiatives in managed services, networking, and IT remarketing.

But beyond the titles and achievements, Alexander is someone who truly walks the talk. His personal mission is to reduce the ecological footprint of IT—not just through strategy, but through action. He believes in empowering teams, embracing change, and always staying curious about what’s possible next.

With a mindset shaped by both business acumen and ecological responsibility, Alexander inspires others to rethink how we use technology—not just for efficiency, but for a more sustainable future. As he often says, quoting Leonardo da Vinci: “Being willing is not enough – we must do it.”

A Green IT expert, Alexandre Isaac is the founder of THE REPAIR GROUP, a holding company bringing together several organizations specialized in electronic repair and circular economy innovation.

REAV enables the setup of high-end repair workshops worldwide. The company designs, installs, and operates advanced refurbishment facilities, providing expertise in processes, ERP systems, technician training, and operational scaling.

SEENSYS specializes in refurbishing IT assets for businesses. It stands out for its sustainable approach: detailed auditing, repair (including motherboard microsoldering), secure data erasure, and the resale or repurposing of equipment. SEENSYS actively helps reduce electronic waste and supports the local circular economy.

Alexandre founded THE REPAIR ACADEMY, a microsoldering school that trains qualified technicians to extend the lifespan of electronic devices.

He also serves as Deputy Secretary of RCUBE.org, the French professional federation for reuse and repair, which unites and supports industry players committed to extending product lifespans, strengthening the circular economy, and fighting waste.

Hamzah Khan is an entrepreneur and recommerce leader, driving innovation in the global consumer electronics trade through Fonebox FZE, a Dubai-based B2B company specializing in pre-owned smartphones and tablets. With multi-million-dollar monthly revenues and a network of international suppliers and buyers in over 10 countries, Hamzah has built Fonebox into a trusted hub for sustainable recommerce in the Middle East and South Asia. Under his leadership, the company continues to scale rapidly, delivering 5–10% monthly growth while promoting circular-economy practices that extend the lifecycle of electronic devices and reduce e-waste.

His passion for recommerce and sustainability positions him as a leading voice in shaping the region’s future of sustainability-driven entrepreneurship.

Simon Sinan Ventura is a business leader with over 18 years of experience in finance,
consulting, and entrepreneurship. He began his career in strategy and investment banking at
leading financial institutions such as Citibank, UniCredit, and TSKB, and also gained
experience in management consulting through global projects.
Combining his corporate background with an entrepreneurial mindset, he entered the e-
commerce space in 2012. For five years, he led the company to become one of the fastest-
growing and most successful scale-ups in Turkey and Europe, reaching millions of users. He
successfully exited the venture to strategic investors and went on to establish Entas Group,
through which he has spearheaded innovative ventures and export operations across
various sectors.
Focusing on technology, sustainability, and next-generation business models, Ventura
founded the fintech startup Kiralabunu in 2020 with the aim of transforming access to
technology. He currently serves as the company’s CEO, leading its ongoing growth.
A graduate of the German High School in Istanbul, Ventura holds a Bachelor’s degree in
Industrial Engineering from Koç University and an Executive Master in Finance from
INSEAD, one of the world’s most prestigious business schools.

At 50 years old, Leon Lindblad has built a career in the computer refurbishment industry. Starting in 1998, he first ventured into used computers and eventually created his own path as an entrepreneur.

In 2001, he founded a business focused on refurbishing laptops, inventing keyboard overlays known as “SticKeys.” This was a novel idea at the time, predating UV printers.

With his wife and business partner, Joanna Seager, Leon established CFA Trading LTD in 2004. In its early days, CFA manufactured USB optical drives using excess internal drives and plastics sourced from China. This project aligned with the rise of netbooks and became a key part of their business.

Between 2006 and 2008, CFA expanded, supplying Dell in Europe with batteries and power supplies and performing board-level repairs for other companies. They also engaged in refurbishing scrap Dell laptops and video gaming cards.

In 2012, Leon’s commitment to environmental sustainability led to the installation of a 50KW solar system and a BIOmass boiler at CFA, eliminating their reliance on fossil fuels.

CFA experienced growth and recognition, becoming a prominent Microsoft Authorized Refurbisher (MAR) in the UK and Europe. They also explored new methods, such as spray painting laptops to upgrade their appearance, and later, producing their own skins.

The company’s innovative efforts were acknowledged with a MAR innovation award in 2020. Later that year, CFA was sold to Global Resale in the USA.

In 2022, Leon embarked on a new venture, founding a refurbishment company focused on 100% refurbishment training services and supplies. This company aims to assist others in refurbishing locally, providing necessary training and support.

Leon Lindblad’s career reflects his entrepreneurial nature, innovative thinking, and consistent consideration for environmental impact. His work in the refurbishment industry showcases a practical approach to business and a commitment to sustainability.

Dr. Philipp Gattner is the CEO of rebuy recommerce, one of Europe’s leading recommerce companies focusing on consumer electronics and media. rebuy positions itself as a quality leader, aiming to move the recommerce market from niche to mass market. Philipp holds a bachelor’s degree from the University of St. Gallen, a master’s degree from the London School of Economics, and completed a PhD at the University of Witten/Herdecke. Prior to joining rebuy, he worked as a consultant at McKinsey.

Sean has worked as a supply chain and commercial leader in the Telco industry for over 15 years. During his time working within mobile phones at giffgaff, he has led his teams through periods of early growth, turning the category into a significant contributor to the overall business. Growth was further boosted by the development of “marketplace”, a refurbished phone proposition with an emphasis on meeting and exceeding consumers expectations, in particular on quality.

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Andrii Kosar is the CEO of Breezy, a full-cycle provider of sustainable solutions for tech device trading, dedicated to the circular economy and extending the lifespan of gadgets. Breezy’s services include Trade-In as a Service for large retailers, telecom operators, and e-commerce platforms, as well as tech device buyback, ITAD, and DaaS for enterprises. Refurbished devices are processed at Breezy’s facilities and returned to the market through partners and the company’s own branded retail.

Under Andrii’s leadership, Breezy has expanded its partner portfolio to include over 45 authorized
Apple, Samsung, and Xiaomi resellers, covering more than 4,500 stores. With over ten years of
experience in retail management, Andrii has built extensive expertise in driving a world-class
organization focused on customer experience, innovation, and sustainability. He is passionate about
making modern technologies more affordable while reducing the environmental footprint of electronics.
Andrii’s leadership and deep understanding of retail trends have helped Breezy, founded in Ukraine,
become a leading trade-in provider across seven countries.

Michael Schmelcher is passionate about innovative, tech-driven solutions in sustainable refurbishment.

With over 10 years of experience in IT remarketing, Michael has led teams and projects focused on extending the lifecycle of used IT and reducing e-waste. His clear mission: to preserve natural resources through smart reuse and sustainable business models.

After earning his Master’s degree, he previously held senior positions at AfB and now serves as Managing Director at GEWA IT Remarketing / Multimedia in Switzerland.

Michael thrives on connecting people, ideas, and partners to drive the future of circular IT.

Thomas is CEO and Co-Founder of circulee GmbH, a B2B Green-IT pioneer, which provides companies
with highest quality pre-owned IT Hardware and adjacent services. He has 15+ years of experience in
building and scaling digital businesses, leading such work at McKinsey and PepsiCo among others.
Thomas holds a Master of Engineering and a Master of Public Administration. He is also a passionate
angel investor.

Strategic and impact-driven senior leader with 15+ years of experience optimizing operations, supply chain, logistics, and sales. As Head of Strategic Growth at Revendo, I drive cross-functional teams to scale the business and create synergies that unlock new market opportunities. With a strong background in economics, I combine analytical thinking with strategic vision to make fast, data-driven decisions that drive sustainable success. I thrive on thinking outside the box to solve complex challenges and uncover new opportunities.