The teenagers, all from secondary schools across Emsworth, Chichester and Bognor Regis, completed the FireBreak course with West Sussex Fire and Rescue.
The youngsters spent five days working alongside firefighters in Bognor, taking part in a range of fire service drills, team-building exercises and learning life-saving first aid skills.
A passing-out ceremony was held to mark the pupils’ achievements and was attended by assisting chief officer Gavin Watts.
Simon Woodland, FireBreak lead instructor, said: ‘I’m extremely proud to have worked with these nine young people and I’m delighted to see how they have all progressed over the week and gained new skills.’
Schools to take part this year included Bourne Community College, Emsworth, Bishop Luffa School, Chichester High School and Chichester Free School, as well as The Regis School in Bognor.