Need Marketing expert to help develop our corporate message

Before reading on - Please note I already have a preferred Graphics designer. I am not after a graphic artist. We are a software company selling security compliance software. We are looking for a marketing expert who can help establish a clear message for some upcomming marketing initiatives we are committed to. We know our product very well however we need someone with a marketing brain to offer advise, ideas and input on how to best explain: - What our company does - What our products do - What our market differentialors are Initially we are creating a Magazine Ad that people pay attention to - this is harder than it seems and it's easy to loose people. We also need to back this up with a simple corporate profile. The right person for us will: - Be a native english speaker - Be an excellent writer of the english language with perfect grammar - Have a background in branding/advertising/marketing - Understand how to deliver a simple clear message. - Preferrably have a background marketing technology products - take a complex product and make it easy to understand - Be able to provide us with reference works where they conceived/invented the message If chosen, you will: - Work with me to brainstorm ideas on the right message- via email and/or skype - Help me come up with 3 mockups for a message which my designer will turn into sample Ads - Help advise the graphic designer on proposed changes to make the Ad nice and clear We consider this a small 'test job'. If we find the right person, there will be more work - we have brochures that need to be reviewed and re-organised next. We will then work on re-designing our entire website and want to re-hash the wording we currently use (very complex, technical and cluttered).