Jaclyn Rosen joined the Gauchos in December 2020, already having over a decade of experience in college coaching, spending time at University of San Diego, Bowling Green State University, University of Cincinnati, San Jose State University, and City College of San Francisco. At USD, Rosen coached swimmers who had 16 NIC qualifiers, broke nine school records, and had over 95 lifetime best times. She has coached all groups, but most recently focused on mid-distance and distance groups. On the recruiting side, Rosen recruited 35 student-athletes over two-and-a-half seasons.
As a student-athlete, Rosen swam at University of Hawaii where she was a team captain her final two years. She went on to get her Masters of Kinesiology with an emphasis in Sports Studies and Sport Psychology at San Jose State.