Results. Less complexity.

LeanOne is a management consultancy with a clear focus on delivering practical results. We advise on how to develop and deliver measures to make companies leaner, more flexible and more customer-centric. We take operational responsibility for our clients’ businesses and help CFOs achieve top performance.

These four values are what drives us:


Focused on the essentials

No matter whether you are a big corporate, a mid cap or a startup, it’s easy to lose sight of the essentials when running a company. What drives us is our desire to help you resolve the dichotomy of “less, but better”: How to achieve better results for customers with less resources?


Geared to practice

Working hand in hand with out clients, our aim is to put ideas and measures into practice – not just write concepts. We are convinced that this is how better and more pragmatic solutions are built.


Pragmatic and fact based

We focus on what’s feasible and what’s viable – from every perspective, be it technological, financial, intellectual or political (including, of course, company politics). And that can only be done based on a sound analysis of the facts.



Good results are achieved by striving for the best solution, but also by listening, finding consensus, forming alliances – and finally by working together to “get it done”.

Dennis Bücker Portrait

Dennis BUEcker

Berater / Geschäftsführer

I spent around 15 years working for various companies as a strategy consultant and (interim) manager with operational responsibility – including management consulting firm Roland Berger, KPMG Corporate Finance, and online retailer LeanOne has been around since early 2019.

There’s one common theme that runs through all my work: Delivering practical measures for companies facing transformation or change – not only in the form of action plans as a consultant, but also with business responsibility as a director or manager.

My project experience has given me profound expertise in the CFO sphere. I support CFOs and finance departments in becoming more efficient and achieving their goals in difficult situations.


  • University of Mannheim: Diplom-Kaufmann (MBA equivalent)
  • Gothenburg School of Business, Economics and Law
  • EBS Business School

Dirk Dzedzeck

Partner / Corporate Finance & Interim Management

I have built my expertise in Corporate Finance in more than 15 years of professional experience as an M&A adviser and in leadership roles in industry, u.a. such as Commerzbank, Clearwater International and TÜV SÜD. Since mid 2020, I am part of the LeanOne team.

The focal point of my career is the M&A process – both, as an adviser and with managerial responsibility in industry, I have led buy-side and sell-side projects and arrange the corresponding financing.

With my extensive experience in M&A and Corporate Finance, I support entrepreneurs and managers in developing and implementing strategic measures and protecting legacies.


  • ESB Reutlingen: Diplom-Betriebswirt
  • Dublin City University: B.A. European Business
  • Goethe-Universität, Frankfurt: Master of Law (LL.M. Finance)