Thomas Bleicher has graduated as an architect in Germany and worked as an architect, lighting designer, and daylight consultant in the UK. SketchUp is a central part in his work. He is now working as a design coordinator in the Cayman Islands.
Robin de Jongh is the author of several books on professional workflows with SketchUp, GIMP, and Unity3D. He has worked for many years in the construction industry as a CAD designer and at one time ran his own architectural visualization company using SketchUp as the main presentation tool. He now works as an acquisitions editor for Manning Publications where he mentors new authors, and publishes books on Open Source technology topics.
You can find him blogging at www.robindejongh.com.