For the knowledge in the field of (international) payroll Fisconti makes use of the external consultant JHPM (Jacques) Raaijmakers, owner of Raaijmakers Tax and Education. Mr. Raaijmakers has over 35 years experience in tax law. Besides his work for Fisconti, he acts as a lecturer for Tax Registry Education, SRA, VLB and NOB.

He has written several books (including Work-related costs 2.0 (2015) Taxlability in Tax Matters (2014)) and is a solid writer of several magazines and books (including courses Tax Law (Cursus Belastingrecht), Kluwer Payroll Guide (Kluwer Loonheffingengids), Tax Practice Journal (Fiscaal Praktijkblad), Reward & Tax (Beloning & Belasting), Journal of Formal Fiscal (Tijdschrift voor Formeel Belastingrecht) and Tax + (Fiscaal +). He is also chief editor of the journal Wage Affairs (Loonzaken)