The Synthesis Imaging Workshop (SIW), in its 17th year running, goes virtual for the first time! The Virtual 17th SIW will be held on 29 June - 17 July 2020 and will be broadcast from NRAO, Socorro, New Mexico. The workshop will comprise of lectures on aperture synthesis theory and techniques, a set of practical tutorials demonstrating data collection, calibration, and imaging of various types of data, including new data from the Jansky VLA, ALMA and the VLBA, and extensive discussion sessions between participants and the lecturers. The workshop will be delivered at a level appropriate for graduate students in astrophysics.