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Management team

Michael Hartmann linkedin


As Chief Executive Officer at QBS group, I am responsible for the overall strategy and P&L at QBS group. I have a long background with Microsoft, where I had different leadership positions in Sales and Marketing. But I always had strong connection into the Small and Medium Business and the partners that serve these customers. Before joining QBS group, I was the global lead for Microsoft Dynamics SMB partners and prior to that, I was responsible for Microsoft’s SMB sales and marketing in the European, Middle East and Africa Timezone.

What made me join QBS group is the clear focus to make our partners more successful. We are passionate to make our partners drive stronger revenue results, while supporting them to lower their cost. The QBS team across Europe is working hand in hand to make this promise come true.

Joop van Voorthuijsen linkedin



Joop Van Voorthuizen

Entrepreneur in ICT, founded a couple of Microsoft Dynamics ISV & VAR companies, initiator and co-founder of the Dutch Microsoft PDC named Partner Master Class. Co-founder of Quattro Business Solutions (QBS group).

"Our drive is to make the difference!"

Specialties: innovation, market approach (sales & marketing), networker, coach, Microsoft Dynamics AX, Microsoft Dynamics NAV 

Richard Bross linkedin

Co-founder & Partner


Richard Bross

Specialties:High level networking.
Being a trusted advisor for medium Microsoft Dynamics Partners.

Jan Leppink linkedin

VP Partner Care & Training


Jan _leppink _klein

General Manager Watermark-Education
Director of Foqus-Improve
Director of Improve Information Systems

Nelson Tavares da Silva linkedin

VP Business Development
Nelson -Tavares -da -Silva _200x 200 (1)

Responsible for developing (partner) business opportunities in new and existing geographies for QBS group.

Having gained an economical education in Amsterdam (HES Amsterdam) he built a strong career within ICT in a wide variety of positions, ranging from network administrator to cloud business development (direct and indirect). 

"I believe in the strength of partnerships, passionate people, healthy life balance and generating visible results."

Specialties: Cloud and network infrastructure, Cloud Strategy & Planning, Account Management, Go-to-Market, Channel sales and Channel management.