Yes, in theory anyone can do Phoenix SEO. There is no governing body for Search Engine Optimization so anyone can sell SEO services.
You need to focus on finding a company that is really good at “local” SEO in the Phoenix market. Some advantages of hiring an SEO company in your local market is that they will have resources and connections that may benefit businesses in that market.
When you are interviewing a local SEO company you ask them about their current clients, references, experience with businesses like yours, and if they have any special resources in your local area.
