Google Local Ranking Improvement

With my current local search engine ranking on Google lying between 11-20, I'm urgently looking for an expert who can help me improve my visibility on the platform. At one time, we were in the top 3, but we haven't done any link building for years, and we had to also rebuild our website. The website is www.vigilantsecurity.net. I am looking to improve my ranking for the following keywords:

Naples home security
Naples alarm company
Naples security system
Naples security cameras
Naples alarm monitoring.

Please propose what you recommend to improve the ranking for these keywords.