Most SEO companies are frauds. Blatant ripoffs at best. But at least some put in the effort of delivering a presentable web site on a good domain. But most do not. So be careful when selecting which one you want to use for your business. What helps is a general knowledge of SEO, so when they tell you what their strategy is, you’ll know whether it’s good or not.
“Organic search engine placement” is an oxymoron because in the case of most of Google’s search results, you will be unable to rank well un-organically. Google actively defends its search results against such tactics spending billions of dollars every year and making 500-600 algorithmic changes per year to improve their search results. You are fighting Google by thinking you can improve your ranking using blackhat techniques or employing a company that does so. Stick to the fundamentals and pick a good SEO company that employs similar strategies laid out in these sites.
Organic search engine placement means being genuinely deserving of your web site’s search engine rank instead of resorting to in-effective and artificial tactics that most SEO companies resort to such as social network spam and useless link building.
Achieving organic search engine placement takes no effort because in the case of Google, your web site will genuinely rank what it deserves for its respective term. So it’s something that occurs naturally, by its very definition it’s not something you can achieve (the word achieve implying you can receive it artificially) when it’s naturally assigned to you. You can however get started by making sure your website is visible to the search engines to begin with.