Joost started Closing the Loop, a company that makes ‘circularity for tech’ tangible, appealing and understandable, today. He works with the technology sector and its stakeholders to turn circular ambitions into results.
Closing the Loop is recognized for its work in emerging markets, customer-focused circularity approach, and partnerships with leading telecom brands to drive towards a closed-loop industry.
Joost has been an entrepreneur for 12 years and has worked in consulting and for the Global Reporting Initiative in the past.

Tibor Foti is the founder of Telcos, a leading distributor of high-quality refurbished smartphones. Previously, he played a pivotal role in introducing major smartphone brands such as Honor, Nothing or OnePlus in Central Europe. Under Tibor’s leadership, Telcos continues to set new standards in distributing high-quality refurbished smartphones, blending his tech expertise with a commitment to sustainability.

Kasper Nørgaard is Remarketing Manager at Egiss/Refurb.eu, where he leads commercial strategy alongside marketplace and distribution sales across Europe. With nearly two decades of experience in the IT industry – and almost 10 years focused on refurbished IT – Kasper brings deep industry insight into building scalable and sustainable remarketing solutions. He’s passionate about making refurbished electronics a first choice through transparency, accessibility, and great customer experiences.

Jean-Brieuc Feron is the founder & CEO of Citronics, a circular electronics company enabling the transfer at scale of old smartphone components into industrial smart devices. J-B is an electrical engineer from UCLouvain (Belgium) with a passion for nature. He worked in the aerospace industry, developing microprocessors for space rockets, before founding Citronics.

After several successful years at PCS Wireless and refurbisher Renewd in the Netherlands, Pieter Waasdorp founded Falster Consultancy, a firm specializing in the global repair and secondary market for consumer electronics, including smartphones, tablets, computers, and smartwatches. Leveraging his extensive industry experience, Waasdorp has guided numerous refurbishment companies in entering new markets and has been instrumental in the development and execution of operator and retail trade-in programs. Falster Consultancy has also played a pivotal role in launching pan-European repair initiatives, ensuring that these programs meet the diverse needs of consumers across the continent.

Falster Consultancy is also the publisher of secondarymarket.news, a platform dedicated to delivering the latest news, insights, trends, and industry gossip from the worldwide repair and secondary market. The site covers a range of topics, including sustainable technology practices, circular economy developments, and innovations in device diagnostics and inspection processes. By offering in-depth analysis and up-to-date information, secondarymarket.news has become a go-to source for professionals and enthusiasts alike who are looking to stay informed about the evolving landscape of the electronics repair and refurbishment industry.

After successful years at PCS Wireless and Renewd, Pieter Waasdorp founded Falster Consultancy, specializing in the global repair and secondary market for consumer electronics. With deep industry expertise, he has helped refurbishment companies expand and played a key role in operator and retail trade-in programs. Falster Consultancy has also supported pan-European repair initiatives. Additionally, it publishes secondarymarket.news, a platform covering industry trends, sustainability, and circular economy developments. Providing insights on diagnostics and inspection innovations, the site has become a vital resource for professionals and enthusiasts tracking the evolving electronics repair and refurbishment industry.

Rzilient is the next-generation IT asset management solution designed to automate, secure, and optimize IT performance while reducing its impact.

Our native Green IT approach combines refurbished equipment (purchase or rental), repurposing of end-of-life devices, and monitoring throughout the lifecycle with proactive vulnerability detection to confidently extend the lifespan of equipment.

Result: -30% emissions, -50% IT costs, and restored peace of mind.

Our ambition: to make security a driver of sustainability, and Green IT a technological no-brainer.

Hung holds a Bachelor’s degree in Computer Science and a Master’s degree in Business Mediation.
With extensive experience in technology leadership, he served as Head of Software Architecture and User Experience at Ericsson, driving innovation and user-focused solutions.

As Co-founder and Technical Advisor at erasoo GmbH, Hung continues to merge technical expertise with strategic insight, helping businesses build scalable, user-centric products.

Conor Dempsey is Senior Director at GSMA Services & GSMA Intelligence, with over 20 years in telecommunications driving innovation in device management and mobile connectivity. He leads global initiatives to promote device circularity, extend device lifecycles, and reduce e-waste across the mobile ecosystem. At Retech Days Business, Conor will speak on GSMA’s focus on sustainable practices and circularity in the mobile device market.

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.

Coming Soon.

Laili Ishaqzai is the co-founder of Molano, a company redefining the role of refurbished electronics in the circular economy. With degrees in law and political science, and a master’s in legal philosophy and governance from leading Dutch universities, she brings a systems-level perspective to sustainability, grounded in both theory and practice.

A former youth debate trainer and international exchange organiser with YEU International, Laili has long been committed to civic dialogue and structural change. She later gained commercial leadership experience in retail, B2B technology and the circular electronics sector, where she served as Sales Director. At Molano, she brings these worlds together to lead strategy, compliance and partnerships, showing how circularity can be both commercially viable and operationally grounded.

Laili specializes in circular supply chain design, digital device lifecycle strategy, and regulatory alignment. She advises on how to translate circularity into commercially viable infrastructure with transparency, traceability, and long-term value at the core.

Sarah MAISONNEUVE has beeen for seven years Deputy Director of ATELIERS DU BOCAGE, a social and solidarity enterprise, member of the Emmaüs movement, and a driving force in social, ecological, and digital transitions. She has led the company’s digital equipment refurbishment activities (mobile phones, computer equipment, and printer cartridges). These activities create jobs for long-term unemployment people and people with disabilities, helping them find sustainable employment. A trained engineer, she has dedicated her career to addressing the challenges of the Energy Transition, the Circular Economy, and the Social and Solidarity Economy for 25 years.

Maria leads the B2B Trade-In direction at Breezy — a full-cycle provider of sustainable solutions for tech device remarketing — driving business development across CIS and EU markets. She focuses on creating end-to-end, sustainable IT upgrade solutions for corporate clients and ensuring responsible recycling of end-of-life electronic equipment.

With a background in IT procurement for global companies and extensive experience in technology sourcing and asset management, Maria combines business efficiency with environmental responsibility, promoting circular economy practices in the tech sector.

Simone Sievernich is the General Manager for the Hard Goods category at eBay Germany, overseeing Electronics, Home & Garden, Media & Lifestyle. With a strategic focus on expanding and enabling Re-Commerce through the refurbished, used and returns business. She is passionate about driving the shift towards a more circular economy both within eBay and across the industry. Her 12+ years’ experience in e-Commerce and commitment to sustainability fuel her efforts to innovate and implement practices that enhance the lifecycle of products, fostering trust and accessibility in the circular economy.

Almost 20 years in the ITK industry. Great experience in the IT-Service business as well as End-of-Life business and Sales

Jörg is a seasoned design leader specializing in socio-technical systems and digital platform ecosystems. With over 20 years in UX and product design, he integrates strategy, systems thinking, and user-centred innovation to shape viable digital business models. As Director/VP Product Design at weframe AG and formerly at 3M GTG, he built cross-functional design organizations and drove human-technology co-evolution in complex enterprise environments.

Renata Filipek-Baryłowska is an experienced business leader with a strong background in
management, B2B sales, marketing, customer service. She has worked across multiple
industries, including telecommunications, construction materials, healthcare, and technology.
She specializes in leading distributed teams and fostering effective collaboration between
management and supervisory boards, with a focus on leadership, communication, and
organizational growth.
At bolttech, she is responsible for managing the B2B market across the entire device lifecycle,
which includes device sales, rental, protection, and management using MDM solutions.

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.