John started his engineering studies at the MTS and continued this at the HTS in The Hague. During the early days of his career, John worked as a CAD drafter and project manager at various architectural firms, continuing his studies at the HES in Rotterdam, where he studied Post H.T.O. Business Administration and John successfully completed the Real Estate Management training.

From 1999 to 2017, John worked at Atelier PRO as a construction cost expert and project manager. During his career at PRO he followed the courses Building cost expert, Budgeting in the Design phase, tendering specification surveyor STABU, “”Calculating on Real Estate”” and “”Entrepreneurship in Construction”” (TU-Twente). In addition to construction cost consultancy, his responsibilities consisted of office coordination, including (project) budget monitoring, manpower planning and quality assurance.

Starting in 2006, John develops and coordinates the use of BIM with regard to costs and specifications within design and execution processes. Part of this is also sharing knowledge in this area with project partners and clients, such as the Luxembourg government.

In 2017, John joined IGG as a senior construction cost consultant and BIM specialist. His responsibilities are: preparing estimates and budgets, reviewing plans and budgets, consulting the client on construction costs, advising the project teams and clients on the regulations, as well as supervising and managing projects in design and execution. For IGG, John is involved in the Schiphol A-area, the Lego Discovery Center in Scheveningen and the reallocation of the Ambachtsschool in Enschede.

In addition to his work at IGG, John is also a guest lecturer at the post-graduate course Building cost expert.