Marketing Guru Needed for Worldwide App

I'm looking for a marketing guru to help take our app to the world in its LAUNCH. We've recently launched a new mobile app tailored to Separated Women (or Divorcing Women) and now it's time to bring it to the world.

Role Title: Marketing/PR Guru
When: Recurring Weekly
Focus: Social Media, Media, PR, Grants, SEO
Preferred location: Australia (for time zone ease)

We're looking for someone who can create a marketing strategy and IMPLEMENT IT, including being the contact on all press releases etc. You must be able to create a marketing strategy that gets our app into the hands of our target audience, and drive sales.

Ideally, the person will have expertise in marketing, and is prepared to drive the PR and Sales of this app throughout the whole world via media outlets, obtaining grants, social media and other marketing channels.

Everything must be done professionally, efficiently, and cost-effectively. We are a start-up so looking for someone who knows the parts that we don't and we can work collaboratively on taking bringing the app to the world.