The merger will create the largest college group in Sussex, providing high quality learning opportunities for around 25,000 students each year.
As part of the merger, Central Sussex College has been renamed to reflect the group's commitment to the local community and will now be known as Crawley College.
Shelagh Legrave OBE DL has been appointed Chief Executive Officer for the group. She is joined by Kieran Stigant, who takes up his position as Chair of the corporation.
A new principal - Vicki Illingworth - has also been appointed for Crawley College. Vicki, who was previously assistant principal at Chichester College, will take up her role from today (1 August), while Andrew Green will become executive principal at Chichester College.
Shelagh Legrave said: "We are delighted to be coming together to form a dynamic group of colleges and businesses focused on championing excellence in teaching and learning.
"Our students at all of the group's campuses will be at the heart of everything we do as we strive to ensure we are giving them the very best education and experience that we can.
"The group will also offer increased opportunities to students - as well as employers and communities in Sussex, giving them a greater access to a wide range of courses at many different levels.
"It is our aim that we will create educational institutions that follow sustainable and innovative structures, encouraging growth and investment."
Kieran Stigant added: "I am thrilled to be part of the new group and excited for the future, which will see increased learning opportunities for students across Sussex.
"We are looking forward to working in partnership with local businesses and organisations to ensure we are able to deliver a diverse and employer led curriculum that meets their skills and workforce requirements."