Social media (Facebook/Twitter/LinkedIn) account management - weekly posts

I own a water filtration e-commerce business which has been growing for almost 1 year. We have Facebook/Twitter/LinkedIn social media accounts set up with small amounts of followers and I am looking for someone to manage these account and create weekly posts on each, and to actively grow our reach/number of organic followers.

This will require someone who has experience managing FB/Twitter/LinkedIn social media accounts, making creative posts and engaging with potential customers.