After working in public relations for several years, Sewell enrolled in Schiller International University, located in Paris, France, where she studied business administration.
He later held teaching appointments as a visiting professor, writer-in-residence, or lecturer at other universities both in the United States and abroad, including the University of Birmingham in England, The New School for Social Research in New York, Schiller College in Paris, the University of California at Riverside, and the University of San Diego.
Leysin is also the home to a number of international schools: Leysin American School, Kumon Leysin Academy of Switzerland, Schiller International University American College of Switzerland, Swiss Hotel Management School, CP Language Institute, International School of Mountaineering, Voxlingua Language School.
Harvard University | Columbia University | Yale University | University of Paris | New York University | Stanford University | Princeton University | University of Cambridge | University of Pennsylvania | University of Michigan | University of Chicago | University of California, Berkeley | University of Toronto | Cornell University | University of Oxford | University of London | University of Oslo | Cambridge University | ATP International Series | University of Southern California | McGill University | Johns Hopkins University | Northwestern University | University of California | Brown University | University of Queensland | University of Minnesota | University of Washington | University of Notre Dame | University College London |
She also holds Honorary Doctorates in Humane Letters from Schiller International University, Park University and Jewell College.
Ticktin has also been a visiting lecturer and supervisor at the Regent's College School of Psychotherapy and Counselling, and at The New School of Psychotherapy and Counselling at Schiller International University, where he worked with Emmy van Deurzen.
In 2011, Schiller International University moved out of the building and sold it to University of Notre Dame of South Bend, Indiana, USA where it was renovated and converted into dormitories.