Ventures

Startups I support as a business angel: with capital, but just as much with sparring, mentoring and doors I can open. Few seats are closer to how new technology really reaches the market than a founding team's first years.

ConBotics
Construction robotics · Berlin
ConBotics builds robots that take over physically demanding work on construction sites. Its first product, the MalerRoboter, is a lightweight, modular painting robot for interior surface coating: it works alongside skilled painters, so the team can prepare the next rooms while the robot coats walls.
The company is a spin-off from TU Berlin and helps the trades respond to the shortage of skilled workers.
Visit conbotics.com
AdaptX Systems
Manufacturing technology · Berlin
AdaptX Systems develops a cooling solution for CNC machining that removes heat in a closed loop exactly where it is generated: at the cutting edge. This works without conventional cooling lubricants and can be retrofitted to existing machines.
The result is longer tool life, shorter cycle times and better surfaces, with less environmental and health impact on the shop floor.
Visit adaptx.de
FixFirst
Circular economy software · Berlin
FixFirst builds the repair infrastructure for the circular economy. Its platform, including AI agents built specifically for repair, gives brands, cities and repairers what they need to run repair services and repair vouchers at scale, in line with EU right-to-repair rules.
FixFirst won the German Ecodesign Award 2025.
Visit fixfirst.io
Fenyx
Circular office furniture · Berlin
Fenyx makes office transformations sustainable, from a single source. When companies restructure, move or modernise their offices, Fenyx digitally records and assesses the existing furniture, gives it a second life through reuse, resale or refurbishment, and delivers the new, move-in-ready workspace.
The result: measurable cost savings and less CO₂, with sustainability that is documented transparently.
Visit fenyx-office.com

Mentoring

Besides investing, I mentor founders on a voluntary basis, mostly in cleantech, greentech and the circular economy. These are the programmes, universities and hubs where I regularly coach startup teams.