Develop a Corporate Identity

We already have a logo designed, we need to do some basic changes on the design front. We need a proper logo file, that can be uploaded at various portals like our Accounting module, on our wassup display and various other application. We are into CCTV Surveillance Business, so we need to design a notice something like "This Place is under Electronic Surveillance" along with our branding. We need mailers, flyers, and we plan to run some offers so we need to design material for the same.