Adonai Business Services bv is a manning agent for seafarers, established at the beginning of 2000 and based in the centre of World's sea port, Rotterdam.

Adonai Business Services BV is an associated member of the Koninklijke Vereniging van Nederlandse Reders (Royal Association of Netherlands Shipowners KVNR) and is joined with the Vereniging Zee-Risico 1967 (Sea Risk Association 1967) and Stichting Koopvaardij (Merchant Navy Foundation).