Investment Banking Requirements
It is incredibly valuable to be able to demonstrate numeracy skills, and you clearly need to show that you have a keen interest in finance or corporate management even if you were not a BESS student. This can be shown through extra-curricular activities, or explained in your cover letter.
Regardless of the course you are studying at Trinity, you need to show good grades. Most competitive management consulting and investment banking firms require a 2:1 minimum. For a summer internship this is based on grades to date, and offer of a full time role will be conditional on a 2:1 in your final exams.
For full time offers, management consulting firms and investment banks typically prefer candidates who have previously completed a summer internship, either with them or a competitor. Due to the intense nature of these jobs, they want to see that you realize what you are committing to!
Finally, there is a very high conversion rate between summer interns and full time offers, so students who are interested in management consulting or investment banking should apply for summer internships in junior sophister year. It can be more challenging to receive a full time offer if you apply in your final year, because there are fewer spaces left after summer interns have been made and accepted offers. Even full time offers made to candidates who have completed a summer internship will likely be conditional on a 2:1 overall grade.