# Roald Sieberath

> Roald Sieberath is a startup investor at LeanSquare (Brussels). See 0 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [LeanSquare](https://shizune.co/investors/profile/leansquare)
- Location: Brussels, Belgium
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/roald/
- X (Twitter): https://twitter.com/roald
- Website: https://x.com/roald

Roald Sieberath is a startup investor at LeanSquare in Brussels. Roald has been an entrepreneur most of the past 25 years. He’s been involved as co-founder, shareholder, and board member in a handful of companies that have done video streaming, mobile messaging, ebooks, elearning, Big Data, and business applications. He has raised an aggregate $18M of venture funding, including one failure, one exit. For thepast three years, Roald has been a Venture Partner for LeanSquare, a tech seed fund based in Liège, Belgium. He has a keen focus on “Deep Tech”, including AI, AR/VR, blockchain, and IoT. In the past 10 years, Roald spent considerable time coaching startups as part of several accelerators and incubators, including: Microsoft Innovation Center (Belgium), Nest’Up, StarTech, VentureLab, BeCentral, French Tech Culture, YunusSB (Tunisia), and MG Seed (Brazil). He co-founded BeCentral, a large space devoted to digital skills located above Brussels Central Station, home to 40 startups, advocacy groups, and training centers including Google Atelier.

## About LeanSquare

VC Fund · Liège, Belgium

New Economy Startups Investor & Accelerator

3 contacts available at LeanSquare.

| Name | Title | Profile |
| --- | --- | --- |
| Roald Sieberath | Venture Partner | https://shizune.co/investors/profile/roald-sieberath |
| Ben PIQUARD | Executive Advisor | https://shizune.co/investors/profile/ben-piquard-425d |
| Gérôme Vanherf | Venture partner | https://shizune.co/investors/profile/g%C3%A9r%C3%B4me-vanherf |

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