About Zizero.


Zizero is founded by Niek de Greef after working for ING, Computer Task Group and IBM. Niek is an experienced IT architect and consultant, project manager,  mentor of IT professionals and teacher of IT architecture and technology courses. 

Further highlights are:

  • More than 30 years international experience in IT with successful planning and implementation of IT architectures.
  • Experience working with leading international organizations in Finance, Industrial, Public, Transport and other industries. 
  • Deep knowledge of integration architectures and mainframe technologies. 

Zizero works closely in a network of specialized business partners with which we can take full project responsibility where clients prefer this. 

Recent project deliverables

  • Solution Architecture for Financial Transaction Manager solution for a Payments Engine
  • Analysis, planning and realisation of Financial Transaction Manager for Swift Services upgrade and implementation of Swift Customer Security Programme
  • Mainframe middleware provisioning solution architecture, realization and staff training
  • Architecture roadmap for Mainframe platform and integration architecture 
  • Architecture vision and roadmap for backend application platform
  • Deployment automation solution architecture and implementation with UrbanCode Deploy for Financial Transaction Manager and IBM Message Broker / Integration Bus
  • Infrastructure provisioning automation vision development, roadmap definition and solution architecture
  • Integration architecture for a core banking transformation program with DataPower and CICS
  • Technical application architecture for Current Account application and integration
  • IT Knowledge Management solution with Rational Asset Manager
  • Web application and infrastructure solution
  • Application server technology migration
  • IT Architecture professional course delivery
  • Technical training development and delivery
  • IT Architecture tooling course delivery
  • Architecture and integration workshops
  • Mentoring career and profession development

Publications and presentations

The future for z is here -Towards a modern mainframe architecture

Talk at the Dutch GSE architecture workgroup,
June 2018

What traditional enterprise applications can take away from the microservices approach

Talk at the Dutch GSE conference
November 21, 2017

Smarter Infrastructure: Thoughts On Big Data and Analytics

An IBM Redguide publication
May 7, 2015

Cognitive computing: Can you get your head around it?

First published on the IBM Smarter Computing Blog,
June 17, 2013

The hybrid face of future transaction processing

First published on the IBM Smarter Computing Blog,
March 13, 2013

After the Fact is Not Good Enough

First published on the IBM Smarter Computing Blog,January 31, 2013

Oh no, the system’s down! Where’s the e…ency runbook?

First published on the IBM Smarter Computing Blog,  August 23, 2013

Transaction Processing: Past, Present, and Future

An IBM Redguide publication
September 28, 2012

And talk at the IBM TSE conference, March 2013

The Value of the IBM System z and z/OS in Service-Oriented Architecture

An IBM Redpaper publication
September 8, 2006