Marten Deinum is a submitter on the open source Spring Framework project. He is also a Java/software consultant working for Conspect. He has developed and architected software, primarily in Java, for small and large companies. He is an enthusiastic open source user and long-time fan, user, and advocate of the Spring Framework. He has held a number of positions, including Software Engineer, Development Lead, Coach, and also as a Java and Spring Trainer.