About Modem SEO

Modem SEO is a Search Engine Marketing (SEM) and Search Engine Optimization (SEO) agency. We help companies promote and advertise themselves on major digital platforms like Google, Bing, Youtube, Facebook, and more. While these platforms are open for anyone to use, it takes significant expertise and time to utilize them to their full potential.

Company History

Modem SEO is the new evolution of Greater Sum Marketing, a marketing consulting business run by Sean Kelly since 2014. After years of working as a general marketing consultant, in 2018 Sean began focusing on serving the growing demand he saw for SEO and SEM expertise. To communicate this new specialization, Sean rebranded his consulting business under the name Modem SEO and has continued to develop and refine his methods to better serve his client’s needs. 

Modem's Values

1. Search Engine Marketing is what we do

Marketing is a broad field with many different skills and disciplines involved. Instead of trying to be a marketing jack-of-all trades, Modem focuses on doing one thing well, search engine marketing (SEM)

2. Empower businesses to better understand and utilize the internet

Many business owners and managers find it difficult to run their own search marketing. They often lack the time and/or expertise needed to do so effectively. It can even be difficult to hire someone else to do it because managers don’t know what questions they should ask. Yet despite these challenges, business leaders recognize that search engines are a powerful marketing tool that they need to find a way to utilize. Modem SEO believes that teaching clients and other business leaders some of the basic principals and language of SEO helps everyone.

3. Not all clicks are created equal

All to often online campaigns are set up to only bring in the largest amount of traffic. Initially this may sound great, but many times this approach is not cost effective in driving sales. At Modem we always watch your bottom line to make sure you getting the best return possible for your ad budget.

Sean Kelly


I help build the connections that bring people together. I’ve been doing that as a marketing consultant since 2014, and in that time I’ve helped clients in consumer goods, non-profit organizations, and the creative arts to more effectively communicate with their customers and other shareholders. My education includes two marketing degrees, a Bachelor’s  from Columbia College in Chicago and a Master’s from Roosevelt University.

For fun I like to playing board games with friends,  watch sci-fi shows, read comic books, and listen to hip hop and house music.