Yes, your website rank is not permanent and continues to change. There are hundreds or more companies that are using SEO services in Dallas to outdo you and grab the top rankings. So, even if you’re up there on the SERP, do not stop SEO; instead, persevere more.
Also, Google algorithms change; the search engine introduces some 500-600 algorithm changes in a single year. Let your SEO company in Dallas continue with SEO marketing and maintenance services for your site.
It helps to retain your site’s SE ranking while outwitting competitors.