WHO WE ARE | Castle Marketing Group
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Castle Marketing Group is a results-driven sales and marketing firm with years of experience in helping businesses reach their goals.Castle Marketing Group was founded with the intention of providing sales and marketing services to businesses around the world. From our humble beginnings, CMG have evolved into a major employer in our community, and have clients across the United States.CMG holds the exclusive sales and marketing agreement with a national law firm with thousands of clients. CMG handles their digital marketing efforts including a CPC campaign, social media strategy, content creation and management, web design, sales support and processing, and more. Another of our clients is a large Christian lifestyle social media network. CMG built a custom WordPress for this client to accommodate a huge amount of unique traffic. CMG also provides web content and blog articles.

about us

We provide services like digital marketing, social media management, and content writing to a variety of clients in the Greater Nashville Area.


Sean Austin

CMG’s success is due in large part to President Sean Austin’s sales and marketing philosophy, informed by his years as a Master Chief in the United States Navy, his experience as a Navy recruiter, and an entrepreneur with years of experience in building and growing businesses.


Sean Austin started his first consulting business in January of 2009 with his son Nic Austin. The two worked as a team to quickly grow that business into the largest company in their industry. This growth attracted the attention of a leading national law firm. In March of 2015, Sean Austin sold the assets of his first business and formed Castle Marketing Group to use his expertise to provide sales and marketing services to the law firm and other clients.


Sean Austin has experience that is invaluable to CMG’s clients. He grew a company from a humble start into a multi-million dollar effort. Sean and Nic Austin discovered, and developed, sales and marketing techniques that have been tried and tested in a real-world success story.

Our Services

We are a sales and marketing firm, which makes us different from other marketing firms you may find. We don’t just market your business; we can help you build a sales strategy that will help you use those marketing results for sustainable growth.

We Are

Results Driven

What use is increasing traffic to your website if you aren’t getting more sales? Why spend money on a lead-generation campaign if you aren’t well equipped to turn those leads into customers? Do you know who’s going to read your new content or press release?

  • Website Design and Development
  • Content Writing
  • Public Relations
  • SEO, Local and National

  • Cost Per Click (CPC) Campaigns
  • Paid Facebook Marketing
  • Organic Social Media Engadgement
  • Sales Strategy Consulting & Support