Workers from Mars Chocolate's graduate programme, based in Dundee Road, Slough, hosted a Graduate Network day at Beechwood School, in Long Readings Lane, Slough, on Wednesday, November 13.
The confectionary giant signed up to the Business Class programme, run by charity Business in the Community, to partner with the school in September.
Claire Henry, a current Mars graduate, said: "It was a great opportunity to be able to talk to young people who are just starting to think about their options when they finish school.
"The pupils were really keen to hear about our experiences and how we made our decisions about which course and university to choose."
Five current graduates and two HR staff at Mars spoke to the 105 sixth form students, who asked questions about career paths, university application processes and quizzed the staff on their own careers.
Student Tausif Lodhi added: "Talking to the graduates helped me understand more about life at university. Overall I think it was enjoyable and would recommend the experience to other sixth forms."
It is the first event in the new partnership, which will last three years and see Mars support the school in a variety of activities.
The Business Class programme aims to build long-term, needs-led partnerships between businesses and secondary schools.
Head teachers drive the agenda with businesses using the partnership to develop the skills of their employees through volunteering - inspiring future company employees.