Spliethoff Amsterdam is a Dutch company. By law the vessels need to be manned by Dutch officers as much as possible. However, due to the recent fast growth of the Dutch fleet there is a shortage of Dutch officers and an increasing demand for officers of different nationality.
Your certificates that are, or will be, (up to finishing your education) issued by your government should be in full compliance with the STCW-95 Convention. The country where your certificates will be issued should be on the so-called IMO White List (www.imo.org).