We facilitate connections in bold, new ways
Alongside anonymous spot-buying and one-to-one partnerships, our platform is centred around the evolution of enduring and effective relationships, supporting business continuity and supply chain resilience.
Work at Unite
We want our workspaces – real and remote – to reflect our platform. That means a courageous culture where fairness, honesty, diversity and sustainability are central to all we do. And we’re always human, helping us connect and create value for others.
Adding value since 2000
With 20 years’ experience, we’ve got strong foundations: fair competition, trust-based partnerships and European data sovereignty. Find out more about where we’ve come from and what we’ve learned along the way.
“The opportunity to have an impact is tremendous. For me, it’s addictive. You see how much you can improve.”
Dr Sebastian Wieser
Founder and CEO
Sebastian co-founded Unite (then Mercateo) in 2000. As CEO, he's leading our company’s strategic direction. He's our visionary, the maverick mind behind our innovative B2B network. Sebastian started his career at McKinsey & Company, advising clients on IT strategies.
Sebastian is known for his positive and passionate approach. He’s driven by finding the right solution, believing innovation is not possible without motivation. And he values our transparent and optimistic culture where issues are brought out into the open and people are galvanised to improve. “I’m proud of what is here today, and excited about what we can build in the future,” he said. “It’s not only about having the idea – it’s being able to put it in place.”
“I completely trust in the potential of people and want to help them develop and succeed.”
Peter Ledermann
Board Member and Managing Director
Peter has been on Unite’s Executive Board since 2000. Today his responsibilities stretch from finance and legal to human resources and organisational development. Pragmatic and personable, he previously worked for E.ON Energie where he was responsible for HR and sales.
Peter has been pivotal in establishing and cementing our values, and encouraging a holistic and human-centred approach to development. He thrives on a challenge and is always open to new possibilities. His warmth and optimism are felt throughout the organisation as he works to create value for our employees, shareholders, and the network. “Unite’s growth is like a village becoming a big city,” he said. “As we scale and optimise our processes, we must work hard to keep our wonderful village culture.”
“You should always be open to new experiences and challenges, being curious helps and casts out fears.”
Christel Constant
Board Member and Managing Director
Christel joined Unite’s Executive Board in 2022 and is responsible for marketing, sales and customer success. She brings more than 20 years of experience in leadership roles. At the B2B financial services platform Edenred SA, she contributed to hyper-growth, notably in the German market.
Christel is a doer with a big heart, who initiates and believes in change and likes to forge new paths. With a global mindset, she enjoys translating complex strategic issues into customer benefits and finding pragmatic solutions with fellow team members. For a successful collaboration, she values trust, honesty and appreciation. Interacting with others is especially important, and she quickly wins them over with her positive and likeable demeanour.
Christel sees Unite as a one-of-a-kind B2B commerce platform that connects dynamic market mechanisms with participants, thereby making the world more sustainable. “Encouraging diversity, equity and inclusion within the teams I work with has been important to me throughout my career. As Unite's first female executive director, I want to continue championing this cause, and create a space where everyone can contribute harmoniously.”