Who negotiates for you

Robert Okon negotiates with your large suppliers in person, always together with your buyer, and leads our senior negotiators. He prepares every negotiation with the figures from the pilot review and the Terms Check. You set the targets and limits, and you approve the deal.

He spent more than 25 years in senior procurement positions, most recently at Karstadt and GALERIA, where he headed indirect procurement – from facility management through logistics and IT to staffing services – as well as strategic procurement of merchandise, with a team of 17. Over his career, he has conducted more than 8,000 supplier negotiations, covering direct and indirect costs.

Sebastian Dahm is responsible for Konditionswerk’s product and sales and leads the team for contract analysis, benchmarks and the Terms Index. He makes sure that every negotiation starts with reliable figures: what the contract says, what the market offers and what you actually pay.

As a strategic procurement consultant, he negotiated terms for merchandise and indirect costs and compared them with market and internal benchmarks. At METRO, he learned that stable processes determine cost advantages. At Peek & Cloppenburg, he went through the pandemic, with store closures and omnichannel, a time when decisions had to be made at short notice and on the basis of data.

Jean-Luc Winkler and his team develop the AI we use to read contracts, compare terms and prepare negotiations. He is responsible for the architecture, the tools and the secure operation of our applications.

At Rinascai, he is responsible for product and technology, including the Rinascai AI Suite. Before that, he was CTO of Conversionmaker.ai and spent around ten years at the Otto Group, most recently at Otto Group Digital Solutions, the group’s company builder.

Stefan Wetzler is a Managing Director of Rinascai GmbH, which offers Konditionswerk. He brings the perspective of senior management in retail.

For around 15 years, he led the digital and e‑commerce business of major retailers: from 2020 to 2024 as Chief Digital Officer at Manor in Basel, before that as Managing Director and CMO of Lidl Digital, as Director E‑Commerce at Breuninger and as Divisional Vice President E‑Commerce at Heinrich Heine. Alongside this, he founded and ran the online marketing agency netXperience.