2ARC team
The following experts are part of the 2ARC team:
Jos de Waal CISA (managing partner)
Jos de Waal joined 2ARC early 2013. He studied Business Economics at the Erasmus University Rotterdam where he also followed the IT auditor program. Jos has more than 10 years experience in SAP security. He was involved in many projects at international companies as well as smaller Dutch companies. These projects have a wide range of topics, e.g. GRC and IDM projects, authorization (role) architecture implementations, role redesign, authorisation and other audits. More technical IT topics always have Jos’ special interest.
Marcel Huijskens (partner)
Still residing in Singapore, Marcel Huijskens re-connected with fellow ex-CSI peers Klaas Piet and Jos in 2016. He joined 2ARC as partner in 2021 in anticipation of his return to the Netherlands. With his background in public financial auditing, Marcel is specialized in IT auditing and GRC consultancy of SAP systems ever since the early 1990’s. He co-founded the CSI software and consultancy companies, both respected boutique firms in the field of SAP authorizations and segregation of duties.
Jay Chandra (principal consultant & director MARC Solutions)
The driving force behind MARC, SAP security software, is Jay Chandra.
After a career at one of the big4 accounting firms, he joined CSI, location Singapore. From there he worked for 4 years in the Netherlands.
Today he is working all over the world on specific SAP security problems.
Gert-Jan Radstaake Msc. (consultant)
Gert Jan Radstaake has been working as a consultant at 2ARC for some time. He studied Information Management at Tilburg University and graduated on the topic Data Warehouses. He is specialized in the field of Business Intelligence and Information Analysis. Gert-Jan has also a lot of experience in the field of development and management of websites from his other position: besides his work at 2ARC he is the owner of GJ-R web development; specialist in the field of open source websites and web shops.
Roelof Jan van Urk (consultant)
Roelof worked on multiple SAP projects throughout South East Asia, Europe, North America and Australia. He has more than 15+ years of experience in SAP Security & GRC. Former Managing Director of a SAP Security & GRC Consulting firm in South East Asia. Building up teams and managing projects. Knowledge of MARC, CSI and multiple other Risk Management / SoD platforms. Worked together with Jos and Marcel on SAP Security & GRC projects in the Middle East and South East Asia.
Ewoud Modderman (senior IT auditor & researcher)
Ewoud started his career at the University of Leiden as a scientific researcher. Later, the founders of CSI (Jur, Klaas Piet, Marcel and Johan) gave him the opportunity to become a SAP Security (R3, GRC, Idm, HANA, Fiori) specialist and IT Auditor (CISA). Now, with more than 20 years’ experience in the fields of SAP Security and IT Audit at international companies and governmental organizations, Ewoud has become the dedicated professional and coach with the right mindset for governance, security and science.
In the summer of 2022, he joined the 2ARC Team.
Klaas Piet Meindertsma CISA 
(founder of 2ARC and managing director, until January 2021)
Klaas Piet Meindertsma is the founder of 2ARC. He passed away January the 7th, 2021.
Klaas Piet was one of the successor of CSI; a global SAP GRC Consultancy organisation. Later he founded the CSI Meindertsma company and renamed this to 2ARC. He studied Business Administration, Information Management and Accountancy at the University of Groningen and the University of Amsterdam. He was specialized in SAP security and topics on the intersection IT and Finance (cost savings). Recently he conducted research in the field of cyber security and related areas. President of ISACA Netherlands, until 2013. ISACA is the global organization for IT security, control and governance.