In 1998, Ties van Os founded Scheepsmakelaardij Enkhuizen. He is a certified shipbroker. Before entering shipbroking, Van Os worked as a skipper on coasters, racing yachts and charter boats, and in 1986, he sailed as navigator and co-skipper on Equity & Law in the Whitbread Race (Volvo Ocean Race).
Secretary to the Association of Sworn and EMCI Certified Ship Brokers (NBMS), Van Os was closely involved in the training, examinations and certification of ship brokers. He previously served ten years on the editorial staff of Zeilen magazine and, entrusted with certification and promotion, he served on the board of the HISWA qualified yacht & ship broker section for eight years.