Understand
Bring together the business model, objectives and your experience of running the business.
I am Roman Braun, founder of Deistermind. Numbers have interested me for decades. I particularly enjoy exploring business models and business plans: how a business earns its money, which assumptions support its development and where new opportunities emerge.
Through Deistermind, I put my finance and controlling experience to work for SMEs and start-ups. I help business owners understand those connections and use them to make informed decisions.
The initial conversation is free and without obligation. No financial documents are needed beforehand.

What interests me in a business model is how its parts work together: the value a business creates for customers, how that generates revenue and what it needs to be financially sustainable.
That is why I enjoy working with business plans. An idea becomes more concrete when customer demand, pricing, people, investment and payment timing are brought together. We can then see which developments are possible and which assumptions still need closer examination.
I have enjoyed working with numbers for decades. Today, I use that interest to make the connections behind business performance easier to understand and explore the next step together with business owners.
What you want to achieve with your business.
The evidence and assumptions behind the plan.
The developments we can compare.
What the results mean for your next step.
I have worked in finance and controlling for more than ten years, including around seven and a half years in leadership roles. In an international corporate group, I developed controlling structures, improved forecasting and budgeting processes, and supported managing directors and the executive board in financial decisions.
That experience taught me to bring together information from different parts of a business, examine assumptions and explain the financial consequences of a decision. I now put those skills to work for SMEs and start-ups.
For your business, I translate that experience into planning and analysis suited to your questions and day-to-day work. The scope depends on the decision ahead and the information needed to support it.
I start by understanding what you want to do, how your business works and which question matters to you now. Your experience of the business is as important as the figures already available.
We then bring the relevant information together. I examine assumptions, calculate suitable options and discuss what supports the results. You can follow how the assessment is reached and see which questions remain open.
You work directly with me. Where we agree to build a model, you receive an editable system or file and a personal explanation. You can continue using that foundation for new questions.
Bring together the business model, objectives and your experience of running the business.
Connect evidence and assumptions clearly, then calculate relevant options.
Interpret the results and their financial consequences together.
Provide a usable foundation and ongoing support where needed.
I use AI and automation where they meaningfully support analysis. I examine the results and take responsibility for the professional assessment. What matters is that you understand the foundations and can use them in your work.
Consider people, orders, investment and available cash together. See which options work under which assumptions.
Examine the business plan, assumptions and possible developments. The right scope depends on your business stage and the decision ahead.
Understand sustainable earnings, company value and buyer perspectives. Use that foundation to prepare the financial side of a transfer.
I work with businesses in Schaumburg and the Hanover region. Depending on the task, we can work on site, online or through a combination of both.
Tax, legal and technical specialist questions are addressed with the appropriate advisers.
In a free initial conversation without obligation, we discuss your situation and the support that would be useful. You speak directly with me. There is no need to send financial documents in advance.
Book a free introductory call →Opens external appointment booking with Calendly.