Research the company and what makes it stand out. For example, Arup has a big internal research focus and they also publish white papers on different topics. If you find something interesting from the area you are interviewing for, have a read and bring it up during your interview. Another thing to research for Arup are the values and the key speech which are both key components of the company in defining the culture of the organisation.
In general for any interview, having some questions that you want to ask the interviewer is also a great way to find out more about the company and sending a thank you email after the interview is good courtesy.
Graduate, Melbourne