Juan Gabriel Castro — GHL Certified Admin & Director of Nextgen Digital LLC
I'm not a 50-person agency where your account is managed by a junior. I am the strategist, the technician, and the one directly responsible for each client's results. Backed by official GoHighLevel certification.
Juan Gabriel Castro
Director & Strategic Consultant
Who is behind Nextgen Digital?
My name is Juan Gabriel Castro. I am a mechatronics engineer with a master's degree, but over 6 years ago I decided to apply my technical background to something I was more passionate about than physical systems: sales systems.
Today I run Nextgen Digital LLC from Bogotá, Colombia, working with businesses in over 10 countries. We don't have 50 employees or a meeting room with an ocean view. We have something more valuable: proven methodology, official certification, and measurable results.
Why I founded Nextgen Digital LLC
From engineer to digital marketing strategist
My engineering background gave me something most marketers don't have: an obsession with systems. An engineer doesn't design loose parts — they design mechanisms where everything works together. That's exactly what I apply to digital marketing. No isolated campaigns. No disconnected tools. Sales systems where every piece has a clear purpose.
The moment everything changed
Working as a freelancer for different companies, I always noticed the same pattern: businesses invested in marketing but had no system to convert the leads that came in. Ads running, WhatsApp unanswered. Leads falling into an Excel file nobody updated. The problem wasn't traffic. It was the lack of a system. That's when GoHighLevel changed everything for me — and for my clients.
Why I incorporated the LLC instead of staying a freelancer
A freelancer has a clear ceiling: their time. An agency with a system can scale without that limit. I incorporated Nextgen Digital LLC in the United States to operate with international standards, bill in USD, and work with clients in any country without friction. Today, this allows us to serve clients in Colombia, Mexico, Panama, Chile, Dominican Republic, Spain, and the US with the same delivery quality.
What sets us apart from any other agency
Official GoHighLevel Certification — verifiable and unique in LATAM
I appear in the official GoHighLevel directory as the only active GHL Certified Admin in Latin America. It's not a title you buy or inherit — it's an official technical certification that GoHighLevel itself awards after a rigorous exam. You can verify it in the official GHL directory.
Verificar en el directorio oficialOver $3M USD managed in ads with real results
It's not an invented number to impress. It's the sum of advertising budgets managed across Meta Ads, Google Ads, and TikTok Ads over more than 6 years, in multiple industries and countries, maintaining positive ROAS. When I manage your ads, I do it with a methodology proven in high-volume accounts — not with intuition.
Technical foundation most agencies don't have
Very few marketers truly understand how the Meta Conversions API, GA4, GTM, or SQL work. I use them as daily work tools. This means your budget decisions are based on clean, traceable data — not on estimates from the Meta dashboard that lost 30% of events due to iOS 14.
System, not isolated services
When you hire Nextgen Digital, you work directly with me. Not with an account manager who summarizes what the team did. Not with a junior who learned GHL last month. With me. The same person who holds the certification, designs the strategy, and reviews the numbers every week.
Nextgen Digital in numbers
+6 years
in digital marketing
+$3M USD
managed in ads
+10 countries
with active clients
-25% CPA
average for clients
7 days
to have your system live
Who will you work with directly?
When you book a call with Nextgen Digital, you talk to me. When your strategy is designed, I design it. When a technical problem arises, I solve it.
We are a boutique agency. A specialized, high-level technical team focused on direct results.
If you're looking for a 50-person team with pretty presentations but no clarity on who is responsible for your results — there are other options.
If you're looking for a technical strategist with official certification, real experience, and direct responsibility for your investment — you're in the right place.
Ready to work together?
Book a 30-minute call. No strings attached — by the end, you'll know exactly if we're the right agency for your business.
Limited spots per month. I work directly with each client.
Follow me on LinkedIn → linkedin.com/in/juangcastrovega