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A business and technology leader connecting international businesses through people, process and technology since 30 years.

Leo managed growth, development and transformation of sales & service organizations across multiple industries.

C-level executives trust him achieving high business impact with a focus on transforming.

He believes in the value of diversity and being a continuous learner.

His career spans operations leadership, executive and advisor roles at global organizations like Control Data, Baan Company, Arinso, ACS/Xerox/Conduent

Leo Wagemans


Business & Technology Advisor

Passionate about disrupting HR Service models and improving HR EX,  Holger spent 25 years in the services world building & managing HR Consulting, IT and Outsourcing businesses.

He has worked for many multinational clients to implement new technologies, changed and operated service delivery models and enabled HR as a business partner to drive change.

While leading large HR SSC Teams he managed HR services for more than 250.000 employees. He supported organizations like ABB, Airbus, Atos, BMW, Credit Suisse,  Daimler, GM, GSK, Michelin, Pfizer, PWC, UBS or UNHCR.

Holger held several senior management and partner positions with PwC, IBM, UBS, Xerox, and Conduent.

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Holger Leckebusch


Operations Expert & Advisor

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An HR Expert and technology addict since his start in PA & Payroll.

Long time of his career Erwin worked for Arinso in roles, from Project to Business-unit Manager building out Arinso in the Netherlands supporting companies like Essent, CeHaVe, DSM, Shell, Unilever, ING or Fortis.


With his own SAP HR Consultancy Company, Magma IT Solutions, he ran full SAP HR implementations for customers like DSM, Sabic, Opel, ACS, Nestle, Philips, AZM, University of Maastricht, University of Utrecht, Merces, Atos, MediaMarkt, Action, Radboud.

Before founding WALEUM Erwin globally managed the ACS/Xerox/Conduent Payroll Partners like ADP, Nothgate Arinso, SD-workx, Talent2, Ascender, EPI-USE, Cloudpay, ADAM and PeopleStrong.

Erwin Ummels


HR Technology Expert & Advisor

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