Not All Heroes Wear Capes—Some Build Campaigns.

John Pfeiffer is the co-founder and principal of MedGrow, a digital marketing company focused on helping healthcare companies succeed online. A Premier Google Partner and Certified Google Ads Professional with over 30 years of direct marketing and advertising experience, John’s background in database marketing and direct response advertising is ideally suited for the statistical and creative requirements of developing successful internet marketing programs.

John received an undergraduate degree in business & economics from Lehigh University and an MBA from the University of San Francisco. He has worked for major advertising agencies including Ogilvy & Mather, Publicis and Havas and has managed direct response ad campaigns for several Fortune 500 companies including Barclays, AT&T, Wells Fargo, Bank of America, and Citigroup.

As co-founder of MedGrow and with over 23 years of experience in traditional marketing, advertising, and digital marketing, Diana brings a wealth of expertise and proven strategy to the healthcare industry. As the founder of MedGrow, she has spent more than 16 years mastering PPC and SEO, helping healthcare practices grow their patient base through data-driven, ethical, and compliant marketing campaigns.

Known for a results-oriented approach and deep understanding of the healthcare market, Diana has earned over 250 five-star client reviews — a testament to her commitment to transparency, performance, and client success.

At MedGrow, Diana combines decades of marketing insight with cutting-edge digital tools to deliver measurable growth for medical practices, clinics, and healthcare professionals across the country.

Brian is the head of the SEO department at MedGrow, where he leads strategy, optimization, and growth initiatives that elevate the our client's digital presence. 

With 13 years of experience driving organic performance across competitive industries, Brian brings deep expertise in technical SEO, content strategy, and search analytics. His extensive background includes scaling websites to significantly increase visibility, traffic, and revenue through data-driven optimization. 

At MedGrow, Brian oversees SEO operations, mentors the optimization team, and ensures best-in-class search practices that keep the brand thriving in an ever-evolving digital landscape.

Emily leads the Social Media department at MedGrow, overseeing client strategy, content direction, and brand presence across digital platforms. 

With an impressive background in creative marketing and community engagement, she has successfully driven audience growth, improved engagement metrics, and developed social campaigns that resonate with diverse audiences. 

Emily combines creativity with data-driven insights to elevate our client's online voice, connect with customers, and keep their brand ahead of evolving social trends.