About Vast Interactive Consulting

When data and creativity team up, your digital marketing wins.

Vast Interactive Consulting LLC has been doing good business with good clients since 2007.

Vast Interactive is a boutique digital marketing consultancy and content studio founded in 2007. We work with businesses in healthcare, wellness, eCommerce, and consumer products to design marketing strategies that are practical, data-informed, and tailored to each client. Our focus is on creating digital campaigns and content that make sense for your business goals and actually deliver results.

CEO of Just Like You, Jim H.
"Of the dozen or so digital marketing companies and consultants we’ve worked with, Cathy Llewellyn is the only one who delivers on her promises and provides real value for our company."

Growth Marketing | SEO Content Strategy | LeadGen Digital Marketing | Digital Content | eCommerce | Brand Storytelling

VAST INTERACTIVE CONSULTING LEADERSHIP

I’m Catherine Llewellyn, founder of Vast Interactive Consulting. I started the company in 2007 after working at agencies because I wanted to deliver agency-level digital marketing to small and mid-sized businesses without the hefty retainers. I also wanted to skip the layers of bureaucracy so I could be hands-on with every campaign and digital asset, from initial concept to performance analytics.

For my clients, I am your digital strategist, content creator, campaign manager, and partner in business growth. Think of it as hiring the brainpower of an agency, wrapped into one dedicated consultant with a lot of experience working with brands and businesses.

Prior to starting Vast Interactive, my marketing & advertising experience started on national accounts at traditional and digital agencies, including Octagon Marketing on BMW, BBDO on Cingular Wireless, and Ant Farm Interactive | nurun on Equifax. A few times throughout the years, I brought my digital marketing consulting skills to corporate as eCommerce Manager & Content Strategist at DS Service, Razorfish, and Mohawk Industries, to then resume as Principal Consultant of Vast to focus on mid-sized companies and eCommerce businesses.

As Chief Digital Marketing Consultant at Vast, I help businesses grow by auditing digital channels, creating content across websites, social media, and email, running paid campaigns, and analyzing results to drive measurable growth. I also love finding the stories that inspire, refining brand messaging, and turning big goals into practical strategies that make growth feel fun, smart, and sustainable.

I team up with companies, start-ups, and privately-owned businesses to turn digital marketing campaigns into real growth engines. If you want to talk marketing, business challenges, or even Duke Basketball, reach out—I’m always up for a good conversation.

Working with Vast Interactive Consulting, you can expect:

  • Business Strategy with a backbone—clear, actionable, and built to drive results.

  • Digital Content that fits your brand, shows up where it counts, and actually converts.

  • Digital Marketing Campaigns engineered for growth—whatever the channel, whatever the challenge.

  • Decades of cross-channel marketing experience and partnerships, backed by real-world wins.

  • Creatively nerdy problem-solving with serious marketing chops. We keep it real, and expect the same.