Builders, not consultants.

One mission brought the three of us together, new organisational architectures, the ones that let you thrive in a post-AI world. Three decades of systemic organisational development, facilitation and venture building, now turned on the AI transition. Meet the people who will be in the room.

Zone 02 / What kind of builders

None of us set out to be developers. What changed is that AI collapsed the distance between having judgment and being able to build with it, so a strategist, a facilitator and an operator can all ship real things themselves. That is what “builders, not consultants” means here.

Bridge builders

To the AI frontier, translating what works there into what works inside your organisation.

Community builders

Inside large organisations, because AI spreads the way trust does: person to person.

Builders of products and experiences

Working software and agentic systems, and the leadership experiences that put them into your hands. Both are things we build, not decks we present.

Zone 03 / Core contributors

Marcus Druen

Marcus Druen

Founder · Organisational Architect

He built Challenger House because the pattern repeated everywhere he looked, the system slows the very people it hired to move fast. His craft is making the unwritten explicit and the missing middle visible, so a team can build what it finds. He reads AI as the organisational design question of the decade, and does the inner work himself, because you cannot guide people through a transition you have not made.

  • 25 years in organisational development, facilitation and executive coaching.
  • Inside the leadership systems of Microsoft, Telefónica, Sanofi and E.ON.
  • Advisory work with ventures including Xempus and Desolenator.
  • Designed and led the E.ON Sprint, incl. 3-Day Residency.

Will challenge you on treating AI as another tool rollout.

André Cramer

André Cramer

Human & AI Capability Bridge Builder

His work sits where the technology meets the people using it, on what AI does to judgment and decision quality, and on what it takes for a leadership team to stay in charge of both. He developed the Plausibility Illusion framework and a cognitive-effects model that lets leaders feel how AI shifts their decisions before they are taught why. A keynote speaker on AI and human-centred leadership, and curator of the DRANBLEIBEN newsletter and podcast.

  • 25+ years in tech, Silicon Valley (Yahoo!) through to Deutsche Telekom.
  • Led Strategic Communications and the Think Tank for the CTIO board member.
  • Co-founded a 500-person community for responsible technology.
  • Author of the Plausibility Illusion framework; designed the E.ON "Case" exercise.

Will challenge you when you use AI to do the old things faster and call it progress, when the plausible answer wins because it arrived first, and when nobody is asking who cleans up the polished output.

Brittney Bean

Brittney Bean

Builder & Coder · Agentic Systems

The safety net, the person who makes sure what gets built in the room can survive procurement, legal review and IT governance. She stress-tests frontier tooling most AI consultancies have not heard of yet, and she knows how to get a great deal more out of the tools a client already has. No corporate background, which is why she still asks the questions insiders stopped asking.

  • Exited serial founder-operator.
  • Ships AI in regulated environments: security, compliance, data governance.
  • Runs autonomous agents daily on her own infrastructure.
  • Builds the artefacts that survive procurement and IT governance.

Will challenge you to talk less, plan less, look at fewer slides, and get your hands dirty. Do it, do it together, learn fast.

Zone 04 / Our heritage & network

Three decades of systemic organisational development, adaptive leadership and venture building sit behind the three of us. That heritage is the foundation we build on, the same disciplines that have carried teams through hard change, now turned on the AI transition.

The three of us are the core configuration of every house we co-build. Behind us stands a global bench of AI learning instructors, agentic builders, coders and specialists, and we scale the crew when the build demands it.

Challenger House is a startup, deliberately, building on a plot with foundations already on it. We reuse, recompose and rebuild from materials won over decades of transformation and venture work with:

Deutsche TelekomTelefónicaSanofiMicrosoftAdobeE.ONLidlDigitalservice des BundesDiffferentXempusFuture Energy VenturesDesolenatorecoLocked

Zone 05 / Contact

We spark courage to act now.

Bring us a problem