As anyone who has ever worked in SEO will tell you, it's a team effort. Sure, you need a dedicated SEO team to handle the nitty-gritty of optimization and keyword research, but everyone from the development team to the content creators needs to be on board as well.
SEO is about so much more than just keywords and metatags – it's about creating a website that is easy to navigate and full of useful, relevant content. And it's about building links and relationships with other websites in your industry.
If you want to win at SEO, your whole team needs to be invested in the process. This article by Search Engine Journal is a great resource on this topic and provides some helpful advice on how to motivate your teams to care about SEO.