top of page

The Frank Guys


Philippe is often approached as Frank. On the one hand, this is due to his role as the founding father of Who is Frank. On the other hand, Philippe is a gifted storyteller.

His passions are solving unsolvable tasks and developing meaningful organisations. 
communicative | convincing | integrative 

  • LinkedIn - Schwarzer Kreis

Erich Renfer


An important motivator for Erich is the conviction that everything that was will never be the same again. Another motivator is the passion to find stability in constant change.

Both motivators are reflected in his passion, sustainable organisational development.

strategic | analytical | communicative

  • LinkedIn - Schwarzer Kreis

Murat Ortak


Murat is convinced that only an adaptive and learning organisation can create a setting in which the potential of the employees - and thus the success of the company - is ensure.

His primary focus is on anchoring the agile values and mindset in organisations

openminded | understanding | focused

  • LinkedIn - Schwarzer Kreis

Marc Geiger

Organisational Developer

In Marc's understanding of sustainable cultural and organisational development requires two essential elements:
Increased awareness and empathy. Both are important drivers that help organisations manifest behavioural change. 

He is passionate about simplifying complex issues and making intangible elements tangible.

positive | empathetic | motivating

  • LinkedIn - Schwarzer Kreis

Sylvestre Lucia

Founder @thirty3

The craziest thing Sylvestre has done so far was founding thirty3.

As a product and UX nerd, Sylvestre brings a radical user-centred perspective to the collective.

communicative | emphatic | complex 

  • LinkedIn - Schwarzer Kreis
Friends of Frank

Mike Zurbrügg

Founder @thirty3

With what skills can we change our society for the better in the long term? Through self-initiative, courage and the conscious taking of risks.

Mike enriches the collective through his networked and anticipatory thinking. Especially through his consistent demand for change.

courageous | consistent | direct

  • LinkedIn - Schwarzer Kreis

Frank Renold

Founder @anundpfirsich

Frank loves to play. In the theatre, with his peers and an extra dose of craziness. 

As an actor, coach, former co-founder and CTO of, he inspires the collective with his expressiveness and creativity. He empowers us to push the boundaries and break new ground.

curious | optimistic | friendly

  • LinkedIn - Schwarzer Kreis

Marcel Reinhard

Founder @agile&mehr & Innovations-Coach @SBB

«A Brief History of Humankind» by Yuval Noah Harari, is Marcel's book recommendation for our society.

Whether as an entrepreneur, innovation coach, agilist or as a follower of collegial companies. His experience and passion for meaningful organisations and concepts, sustainably strengthens the collective.

courageous | passionate | trusting

  • LinkedIn - Schwarzer Kreis

Stefan Gross

Moderator & Facilitator

When there is disorder in communication processes, Stefan is on hand to help tidy things up.

With structural impulses in mind and moderation markers in hand, he guides the collective into safe harbour even in confusing situations. Outcome instead of output driven. 

critical | compact | open to process

  • LinkedIn - Schwarzer Kreis
bottom of page