陸佑
In 1950, B.M Iversen made Van Sitteren a partner and the firm became Iversen and Van Sitteren. They maintained a permanent office in Kuala Lumpur, moving into the 5th floor of the Loke Yew building the moment it was completed. Iversen headed back to Ipoh and their Penang offices which he led, while Van Sitteren headed the Kuala Lumpur office as well as the temporary Singapore office.