Business partnership is key. Alignment of goals & strategy between business and IT will assure efficient and effective IT investments; selecting the most effective projects, the proper operational focus. Effective partnership for IT is only possible with a solid track record: stable operations, structural cost management and reliable project delivery.

With proper delegation of authority an atmosphere of trust and commitment is created; own initiative and guts will lead to a can-do mentality and an organisation that delivers.


Gerrit Dekker is specialised in IT change management.

  • Restructuring
  • Outsourcing
  • Consolidation
  • Software development life cycle
  • Financial planning
  • Strategy
  • Due diligence
  • Coaching


Senior IT and change manager. Startup, consolidation, restructuring, down-sizing, take-over & merger. Combines strategic and organisational insight with a result-oriented management style, supported by a deep knowledge of ICT.


Gerrit Dekker – Interim Management & Consultancy





2008 – : Interim CIO, CIO Services.

  • 2018 – now: Global IT Director, Mammoet Holding.
    Director of the Shared Service Centre IT supporting APAC, Europe, EMEA and Americas of Mammoet Heavy Lifting and Transport.
  • 2016 – 2018: CIO, Blokker Holding.
    CIO for the Shared Service Centre IT, servicing 9 operating companies in the Blokker Holding, 2400 retail stores and 22000 employees in the Netherlands, Germany and Belgium.
  • TransMission, Interim Manager IT
    Acting head of the IT department at TransMission, the largest cooperation of independent transport and distribution companies in the Netherlands and Belgium.
  • ECN, Interim Director IT
    Acting head of the IT department at ECN in Petten, providing IT services to the ECN and NRG organisations. ECN (Energy research Centre of the Netherlands) is an international leader in energy innovation. NRG (Nuclear Research and consultancy Group) is the nuclear service provider in the Netherlands.
  • E-Plus Mobilfunk, Consultant
    Make or buy, decision support.
  • Vodafone, Programma Manager
    Test harmonisation program across Vodafone in Europe, between Group Commerce & Group Technology and the local markets, establishing the new terminal testing capability required to successfully deliver the Vodafone terminal portfolio across the Vodafone markets.
  • KPN Mobile, Interim Technology Manager
    Replacement of legacy billing and CRM at KPN Mobile, in the Arrow program. Scenario investigation, phasing, structuring, M&P’s, HR, finances. Supplier management: Huawei, NGBSS.
  • Huawei Germany, Interim Program Manager
    Replacement of billing and CRM IT infra-structure at E-Plus. Setting up program structure and PMO on behalf of Huawei, proof of concept, detailed program scope definition.
  • VPPerform, Value Proposition Professional
    Opportunity development and deal shaping services to major European ICT service providers.
  • Fortis Merchant Banking, Consultancy
    Definition and implementation of a new IT Governance organisation structure. Professionalisation of outsourcing relationship.


2003-2008: IT Director, T-Mobile Netherlands BV

Transformation of IT, from supplier to business partner.
Creation of powerful and highly motivated team.
Introduction of company-wide release policy.
Restructuring of the department into a demand-supply organisation.
Cost reduction programs. Nearshoring. Outsourcing of IT Operations.
Due diligence, integration and consolidation of Orange and T-Mobile IT.

1998-2003: IT Development Manager, Ben

Launch of Ben 6 months from start-up. Introduction of incident & change management. Migration of billing and customer care infra-structure.

1995-1998: Project Manager, AT&T/NCR

Responsible for billing migration at AT&T Unisource, Stockholm.

1986-1995: Project Manager, Systems Analyst, Software Developer, Logica BV


“No-nonsense. Sense of humor. Seeing through and valueing basics. These aspects of Gerrit align with his maturity in working in international, multicultural and politically sensitive environments. Due to his entrepreneurial spirit he contributed as a leader in the development of “Ben” as a startup into a major site of T-Mobile.”

Fokke Wijnstra, Partner at FiNext (member of Ordina) and Owner at FCW Management


“Gerrit is a professional with many years of experience in managing complex change processes with an even more complex IT environment (telecom). He is a loyal colleague who is dedicated to his job and who you can trust. I surely recommend Gerrit as a colleague.”

Peter Meefout, Sales Director Credit Services at Experian Netherlands


In his roles as manager development and later as director Information systems he has been a decisive and focussed manager clearly understanding the needs and wishes of the business community. He has been able to shape the IS department at T-Mobile into a well organized, productive organization able to fullfill the set goals and targets. From a personal perspective I can recommend him as a pragmatic, loyal and supportive manager, who allowed me to learn and grow.”

Riccardo Kovacic, Director at Technology Management Masters BV


“Gerrit is a very experienced manager who knows what he manages as well as how to deal with people. He shows leadership not only in difficult situations, is very authentic and does the right things at the right time and right way. If you have Gerrit in your team, you´re probably on the winner´s side…”

Marcus Berger, Independent Management Consulting Professional  and former CIO T-Mobile Austria


“Gerrit managed to shape the IT department at T-Mobile into an organization that delivers. Large IT projects that have small chance of succeeding in similar sized organizations succeed at T-Mobile due to management commitment and focus. Employees and consultants are all part of the same team creating a highly motivating work environment.”

Herwin Wielink, Owner , imaticka