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Who I am & where do I come from?


Ambitious companies collaborate with me to enhance their chances of success in the future.


years of experience

1+ bn

under management


Marketing Mix Models


Corporate Carbon Footprints


I help businesses grow innovatively on a daily basis

  • After my studies in Tübingen, I flew to London on a one-way ticket. There I slept on the floor of a friend's flat-share room for several weeks while I was looking for a job.
  • My first job was as a sales agent for customisable USB sticks. An agent then brought me to the world's first Facebook and Twitter API agency. We expanded globally. It was a pretty exciting time.
  • A few years later, I moved to Hamburg and started my own business. I knew what it was like to start from scratch.
  • During the last years I have been working in various industries and companies. The knowledge and experience I have gained in this way enables me to create growth in many different contexts.
  • Sustainability is a personal concern of mine. The logo of Fiegenbaum Solutions was designed as a reminder of the pale blue dot: ”It's our responsibility to deal more kindly with one another and to preserve, and cherish, the pale blue dot; the only home we've ever known.”
  • I am the founder of the Carbon Accounting solution MULTIPLYE and support companies in being successful in the future.

I help customers holistically

  • For startups, I am also happy to act as a fractional CMO/CSO, sharing my knowledge and experience.
  • Predictable success with marketing on Facebook, Instagram, TikTok, LinkedIn, Pinterest, Google Ads.
  • Technical solutions for data tracking via pixel, SDK, conversion API and data transfers in general.
  • Marketing Mix Modeling.
  • CSRD reporting.
  • Developing and managing a Net-Zero strategy along the scopes.
  • Implementation of Net-Zero measures along the scopes.
  • Capturing regulatory and physical climate risks.
  • Life-cycle Assessments.
  • Marginal Abatement Cost Curves.
  • Selection of CO2 offset projects.
  • Custom solutions for edge cases.
Facebook Business Case Study: OBI und Fiegenbaum Solutions

It's all about data

  • Data analysis is at the core of my offering, with digital capabilities and technology being crucial for this task.
  • I've honed my sustainability craft through the guidance of consultants from OnePointFive, South Pole, Project Drawdown, and Yale University.
  • My competencies intertwine expertise, skills, and values. This particularly includes the ability to think in systems rather than silos, articulating future opportunities rather than past routines, normative and value-oriented thinking, and circular thinking over purely linear processes.

How I work

  • As a hands-on consultant, I only work with a handful of clients at a time.
  • I only make on-site appointments by train. Sometimes Zoom is more effective.
  • I look for challenging tasks and projects and deliberately chose not to hire employees, as I like to work directly and personally with my clients.



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