Netherlands | Massachusetts Institute of Technology | Austrian Netherlands | California Institute of Technology | Art Institute of Chicago | Institute for Advanced Study | American Institute of Architects | Georgia Institute of Technology | Netherlands national football team | Rensselaer Polytechnic Institute | Rochester Institute of Technology | Franklin Institute | Royal Institute of Technology | Pasteur Institute | Institute of Contemporary Arts | California Institute of the Arts | Institute of Electrical and Electronics Engineers | British Film Institute | Pratt Institute | National Cancer Institute | Virginia Military Institute | Cato Institute | Australian Institute of Sport | Illinois Institute of Technology | Curtis Institute of Music | American Institute of Aeronautics and Astronautics | Advanced Placement | Royal Netherlands Navy | Royal Institute of British Architects | National Institute of Standards and Technology |
He also served as Fellow-in-Residence at the Netherlands Institute for Advanced Study in the Humanities and Social Sciences in 2001-02, a Visiting Fellow in the Faculty of Asian Studies and the Humanities Research Centre at the Australian National University during the first half of 2005, and the Netherlands Visiting Professor of Asian Languages and Cultures at the University of Michigan in 2006-07.
After retirement, Siedentop was a Visiting Fellow at the Netherlands Institute for Advanced Study in Wassenaar, The Queen Victoria Eugenia Professor at the Complutense University of Madrid, Spain, and a Visiting Fellow in the Philosophy and Public Affairs program at the University of St. Andrews in Scotland.