SEO for websites needed each month

I work with several clients month-to-month, and I need someone with experience in SEO that I can outsource SEO services on a monthly basis. I have great understanding of SEO and its automation, so I don't need anyone to oversell me, I just need someone who can optimize the sites, and perform these services on a month-to-month basis. Main Services Needed: 1. Keyword Optimization 2. On-page Optimization 3. Local Search Website Optimization 4. Blog/Article Writing 5. Inbound Link Building