Generally Team lead is the person who can assign the work 
to the testers. Say, If you have 4 modules in ur project 
and 5 testers. every module will be assign to one or two 
testers which again depends on the tester experience and 
knowledge on perticular domain.
The general testing process is the creation of a test 
strategy (which sometimes includes the creation of test 
cases), creation of a test plan/design (which usually 
includes test cases and test procedures) and the execution 
of tests.