Dear Aspirant, 

Yes JOSSA is a great authority that takes up the process of counselling of engineering colleges over the country in a smooth manner. 

JOSSA counselling takes mains and advanced score to allot seats in colleges. 

The portal helps provide with information of cut offs and colleges with branches, categories. 

Hence you can participate in the counselling process as prescribed in the website. 

Hope this helps. 

Good luck.