Susan Hendrik 'Henk' van Sitteren (1904–1968) was a Dutch architect in Singapore and Malaysia. His career began when he came to Singapore and landed a position in Keys & Dowdeswell, then a major international architecture firm. It was during this time that Van Sitteren met his future partner, architect Berthel Michael Iversen. The two would later establish Iversen & Van Sitteren Partners - with branches in Ipoh, Penang, Kuala Lumpur & Singapore. The firm was one of the most important in Southeast Asia for establishing a foothold for international style modernism.