Welcome to FT!
What level thesis? (Bachelor's, Master's, doctoral?)
What major field? (Marketing? Strategy? Operations research? Aero engineering? It makes a big difference!)
What university and (if applicable) what college/faculty/department within it, if that doesn't provide too much personal identification? If it does, what general type of university/etc., and in what country?
Do you have an advisor, or a pool of possible advisors? What are their specialties? If you're at the graduate level, do they have an research grants you could work on?
We can give you a lot of help, but we need something to work with beyond the word "dissertation."