We’re Data Driven Folks Obsessed with Your Growth

Welcome to the Cardinal Flock

We’ve perfected the art and science of marketing for medical professionals

“Cardinal isn’t just another digital marketing agency. We’re an agency built on evidence and results.

I know there’s an endless array of “latest trends” and “fresh ideas” out there, and while some are worth implementing, in the end I wholly believe that marketing is useless unless there is clear data that backs up a return on investment.”

– Alex Membrillo

At Cardinal, we specialize in helping medical practitioners and organizations expand their reach and grow their patient base through campaigns built by data.

In our quest to deliver the best possible ROI for our medical clients, we developed a proprietary marketing platform that provides our clients access to the types of data they need to improve and develop their future strategies.

This platform is just one example of how we’ve written the book on medical marketing. We know firsthand the complexities and obstacles professionals in the medical world endure as they market their practice.

We have the proven track record to help you overcome these challenges and turn them into long-term growth opportunities.

Alex Membrillo

Alex Membrillo is the CEO of Cardinal, a digital marketing agency focused on growing multi location companies. His work as CEO of Cardinal also recently earned him the honor of being selected as a 2015 and 2016 Top 20 Entrepreneur of metro Atlanta by TiE Atlanta, Atlanta Business Chronicle’s 2016 Small Business Person of the Year (Rising Star), and the 2015 Digital Marketer of the Year by Technology Association of Georgia (TAG).

Cardinal has experienced exponential growth under Membrillo’s leadership, being consecutively named on the Inc. 5000 list of fastest growing privately-held US companies for the last three years. Membrillo’s innovative approach to digital marketing has transformed the industry and delivered remarkable results to clients of all sizes and markets. He has been featured in leading national publications including The Business Journals, Entrepreneur, Search Engine Journal, and The Wall Street Journal. He has also served as an expert speaker for conferences including the American Marketing Association, SouthWired, and Vistage Executive Leaders, where he spoke on his unique approach to Millennial Management to over 400 CEOs.

Alex Membrillo Cardinal CEO
Jason Donovan

Jason Donovan

Driven by client results, the individual growth of Cardinal team members and the future growth of the agency, Jason is focused on the integration of all of the components that make Cardinal a great marketing partner for clients and a great place to work for every employee.
Jason’s background includes marketing and operations, and leadership roles in local, national and multi-national companies such as StubHub.com, global fastener giant, YKK, and his own previous ventures.
A graduate of the University of Georgia, he is an active volunteer with Golden Retriever and Labrador rescue groups in Atlanta.

Rich Briddock
VP of Paid Media

Richard’s digital marketing experience includes working on multi-million dollar media accounts for a number of fortune 500 companies including Verizon, H&R Block and Equifax. He is a specialist in holistic SEM strategy, paid search optimization, mobile optimization, conversion and analytics and is always looking to develop innovative approaches to improve client performance.
Harking from England, Richard chose and unusual path to digital marketing having studied law in London before co-founding a legal start-up company in Atlanta. Outside of work, Richard is an avid soccer fan, who enjoys running, travelling and spending time with his new son, Thomas.

Lauren Thomas
Vice President of Client Services

Lauren joined the Cardinal team with a strong background in public relations, marketing, and branding. She moved to Atlanta from New Jersey for the opportunity to work with some of the city’s key players in entertainment, television and music. With a passion for learning, Lauren is constantly looking for innovative ways to create and build recognizable and long-lasting brands. She earned her degree in Magazine Journalism from the Newhouse School at Syracuse University, with a minor in German.
As a true travel enthusiast, Lauren lived abroad in Germany for two years, spent a semester exploring Australia, and visited 6 of the 7 continents….so far!

Melissa Kerwin
Associate Media Director

Melissa is a social media advertising manager, she comes to Cardinal with over 5 years’ experience, having worked with two Facebook Innovator Award winning technology companies. Her vertical specialties include Hospitality, Retail and CPG, working with clients such as Papa John’s, Cox Media Group, Brand USA, Cost Plus World Market, and Tractor Supply Store. She credits her background in business and economics for creating her thirst for analytics and loves interpreting any kind of data.
Melissa grew up in New York State and moved to Atlanta in her early twenties. She graduated from Georgia State University majoring in Economics. Outside of work Melissa loves watching football with her husband and cooking. She also enjoys spending time with her rambunctious nephews, Jude and Benjamin.

Allison Reinert
Senior PR Partner

Allison Reinert’s marketing and public relations experience spans more than a decade. Believing that Internet marketing and PR are pivotal components to any businesses’ long term growth and success, Allison always strives to find the best and most cost effective ways to meet the needs of clients.
Allison’s background comprises of marketing for local and national brands in a range of industries including consumer and professional services, retail, hospitality, and banking. In addition, her PR initiatives have resulted in getting clients and colleagues featured in a range of publications including national media outlets such as Entrepreneur, AMEX Open Forum, and The Wall Street Journal.
A graduate of Columbus State University, Allison earned a B.B.A. degree in Marketing with an emphasis in Management. She has been happy to call metro Atlanta home since 1995.

Holly Robowski
Media Director

Originally from Chicago, Holly came to Atlanta ready to immerse herself in southern culture and warmer weather. She has experience working at both small and large agencies on multiple brands, such as Carters & OshKosh B’gosh, BlackBerry, CNN, Turner Broadcasting, and Burger King. After graduating from DePaul University, Holly began her career in search marketing right away. You can often find her digging deep in the data, organizing spreadsheets, creating charts, and analyzing performance.
When she’s not managing search campaigns, Holly also enjoys spending time with her two pups, cooking, drinking wine with friends, and renovating homes.

Erica Tykal
Account Director

Erica has called several cities home, from Detroit, MI to Charleston, SC, but after finding her way to Atlanta about two years ago she’s decided to plant her roots. She loves every aspect of digital marketing, working in-house in everything from industrial B2B to e-commerce, she finally decided to join the Cardinal team to surround herself with a team as passionate about digital as she is.
Erica graduated from Clemson University with a degree in Business Administration focused in Marketing. In the fall she loves returning to Clemson for college football game days. She’s also an avid traveler, and has enjoyed having adventures in Australia, Costa Rica, Bali and beyond! In Atlanta she loves going to summer concerts and taking her Aussiedoodle on hikes.

Alex Strahan
Digital Strategist

Alex joined the Cardinal digital marketing team from an unconventional background as a neuroscientist. From this diverse background, he has brought expertise in data analysis, data aggregation, and predictive modeling that provide unique insights to improve client performance. He loves diving into the data and challenging the way we think about digital strategy.
Born in Charlottesville, VA, Alex has called Atlanta home for the majority of his life. When not wading through data, Alex enjoys hiking with his wife and dog, attending Atlanta United games, and traveling.

Alex Kemp
Digital Strategist

Alex graduated from Georgia College & State University where he majored in marketing. He was first introduced to the world of search engine optimization in his senior year and has been hooked ever since. Alex loves the ever-changing nature of search marketing and learning new strategies and best practices.
Outside of work, Alex enjoys playing music with his friends, playing golf, and being outdoors.

Cardinal’s competitors constantly
try to get us to switch to them.
We are not interested.

Healthcare Clients Who Trust Us


173,880 digital leads in 9 months Blended cost per lead of $3.94 Ranked #1 in local map listings in 50% of searches

40% increase in conversions 25% decrease in cost-per-conversion


21% increase in brand conversions 17% decrease in branded cost-per acquisition

digestive healthcare of georgia

Increased lead volume by 334% Improved rankings for top search terms 20-50 spots hours

Increase of 6 more surgeries each month 325% increase in leads per month

We are proud to announce that our CEO, Alex Membrillo, has released his latest book titled The Anatomy of Medical Marketing.

Offering a step by step approach to increase your patient volume and keep your practice off life support, Membrillo will help you grow your practice with ease.

The Anatomy of Medical Marketing


If our agency had a hairdo, it’d be a mullet: business up front, party in the back. We value the importance of passion, creativity, and fun – coupled with professionalism – as we help our medical practitioners reach their goals and surpass their expectations.


When we built our agency, we knew one thing for sure: we wanted a team of diverse thinkers and doers. From our data diehards to our social media junkies, we’ve crafted a team of talented storytellers ready to help you reach the next level.


If there is no evidence to prove it so, then it must not exist. Seriously – we’re not interested in wasting your time (or ours). We don’t sell our clients on fancy marketing jargon. Simply put: we make decisions based on data, Then we show you the proof that our work made an impact.


The face of healthcare has changed forever. Today’s healthcare system is a consumer-based entity, and healthcare providers must shift their mindsets to that of retailers.


“We were a bit nervous to invest so much in a digital marketing agency but our practice very quickly started generating a return on investment. We couldn’t be more thrilled!”

-Gaye P.
Digestive Healthcare of Georgia


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