Build a website for data management/CRM

a website which will have basic feature of a CRM where after logging in a short form will be filled by sales executive and the form data will be stored on Mysql database which can only be seen by the admin. Few more points as below: 1. There will be 4 levels of login Sales, Tech, Tech admin and Admin 2. sales guy can only fill form 3. Tech admin can only see 1 field of the stored data and can assign the job to Tech guys. 4. Admin can see all data and can edit. a few other points that will be discussed.