Southampton Science and Engineering Festival (SOTSEF) is the University of Southampton's annual festival that allows everyone to explore and discover what the world of science and engineering has to offer.

SOTSEF began in 2002 as a one day, free Science and Engineering Day at Highfield campus where ~200 people attended. Every successive year it has grown bigger and better, winning best Engineering event in 2009 and best STEM (science, technology, engineering and maths) Institution event in 2014. In 2015, SOTSEF was launched officially, moving away from a one day event to a larger programme which included Ocean and Earth Day at the NOCs.

The Festival has continued to expand with new activities and many returning favourites, at local venues as well as Highfield and Boldrewood Innovation Campus (including Lloyds Register).

These days the Festival is organised by the Public Engagement with Research unit alongside the newer Human Worlds Festival and other opportunities which bring researchers and members of the public together.