Smart Solutions

Confidence is the start of good advise. Confidence is mainly based on experience. The OneSmile Network looks back to more than 150 years of experience in consulting at the highest level. To always achieve the right solution for our clients, we stand out in connecting profound knowlegdes of various industries and disciplines. A first-grade team of professionals guarantees top results. Our services focus on the key success drivers of a company.

With OneSmile your company is in good hands.


Methodically based and focused on a fast and pragmatic progress, we are able to achieve desired results in small or large teams. Therefore we refer to a long-grown network of international specialists, which - in terms of expertise - is second to none.


    • sale of company
    • purchase of company
    • company succession
    • MBO
    • MBI

    M & A

    • financing growth
    • financing acquisition
    • financial optimisation

    Corporate Finance

    • growth
    • business model
    • internationalisation
    • innovation


    • processes
    • administration
    • controlling
    • procurement


    • CEO
    • COO
    • CFO


    • branding-strategy
    • corporate design
    • editorial design
    • digital design




Stephan Mathes

CEO & founder

Stephan Mathes (Dipl. Betriebswirt), born in 1965, is the CEO and founder of OneSmile. He looks back to more than 25 years of experience in industries and consulting. He is also founder of the dgroup, one of the leading eCommerce-Consultants in Europe. Before dgroup, he worked for Arthur Andersen (auditing, tax), Saatchi&Saatchi (Advertising)/Zenith Media (Media) und KetchumPleon/BBDO (Public Relations) in leading positions (such as CFO/Shareholder).


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who we work with

Stefan Klostermann

Stefan Klostermann (Diplom-Kaufmann, born 1970) has more than 18 years of professional experience in different industries and companies. His expertise includes business development, marketing & sales strategy as well as transformation and change management with focus on digital transformation. He has worked in different functions for the Otto Group and as strategy consultant for Theron Management Advisors. Before joining OneSmile he managed the dlab for the Hamburg-based dgroup. In addition to his corporate career he has successfully launched three start ups in the fashion, e-mobility and cycling industries.

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Andrea Borgato

Dott. Andrea Borgato looks back to 15 years of experience in leading businesses as well as working in interim management positions. After completing his studies (Diplom-Kaufmann) in Milan and Verona with key fields in Marketing and Quality Management, he was working as a business consultant and project manager for Arthur Andersen for several years. His key aspects dealt with controlling matters, business organisation, due diligences and knowledgemanagement. Since 1995, he is working in interim management postitions for noted, international companies such as the beverage company Gerolsteiner, the automotive company Dreefs, the internet agency Razorfish and the IT-comapany smart e*lliance.

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Clients & Friends

  • “...innovative and without frills. ....stays focussed on the key themes and delivers results...”

    Stefano Castelletti (Faber-Castell Cosmetics)
  • “ the point, with the ability to get the job done. ...has the ability to get to the core of a company and to increase the value...”

    Bodo A. Liesenfeld (Liesenfeld International)
  • “...methodically clean, multifaceted and innovative ... brought things to the point and forward...”

    Marcus Kossendey (POINT4MORE)
  • “...a good Advisor...”

    Anton Graf von Faber Castell (FaberCastell)
  • “Always a good choice. ...perfectly masters the wide range from C-Level up to BlueCollar...”

    Hans-Ludger Körner (Röhlig & Co. Holding)
  • “...was impressed by the effort... deliveres excellent results......”

    Dr. Wulf Dehn (EgonZehnder)
  • “...very effective und efficient...straight deliverables...”

    Matthias Zillmer (Frontline)
  • “…considers all aspects of the situation... interacts... achieves top results…”

    Armin Landgraf (PON Bicycle Group)