Social Media Link Building

I am looking to partner with a company that can help promote my clients articles and press releases through social media channels. One of my clients publishes 20-30 high quality and unique articles per month. These articles already have a strong audience and get between 1000-5000 page views for each article per month. To help better promote these articles I am looking for a company that can seed high quality social media links to further promote the content through social media. We have an RSS for these articles and I would be looking for the provider to seed 15-20 social media links within 24 hours of each article or press release being sent out. These links would need to be generated manually and would need to vary article to article. I am also open to other ideas for further promoting these articles and press releases to generate increased traffic and links if you would also like to include some additional ideas in your response and proposal. If the provider is able to deliver the service successfully this will be an ongoing service for at least the next 6 months.