OUR STORY
BUILT FOR CONCRETE COATING. BUILT TO WIN.
We’re not a generalist agency trying to serve everyone. We chose one industry, mastered it, and built a system that dominates it.
WHY ONSLAUGHT?
Onslaught Marketing was founded with one mission: to give concrete coating businesses the same elite-level marketing that national brands use.
We noticed great concrete coating contractors struggling only because they lacked visibility (not because they lacked skill). You’re probably the best in your market, but but nobody knows it without a robust marketing system in place.
That’s where we come in.
Meet The Team
THE PEOPLE BEHIND THE ONSLAUGHT
Collin Leishman
Co-Founder
- Leads client acquisition, strategy, and sales
- Built Onslaught’s proprietary market domination system
- Specialist in concrete coating industry growth
- Drives partnerships and business development
- Creates and oversees all ad campaign strategies
- Ensures every client has a clear path to dominance
I started Onslaught because I saw that concrete coating companies are trapped in the feast or famine cycle. One month slammed with work, the next month scrambling. Relying on word of mouth and hoping the phone rings. That’s no way to run a business!
We built a proven system that generates actual high quality, homeowner leads every month for concrete coating companies. We only work with one company per territory. When we enter your market, we’re fighting alongside you, we’re on your team.
Onslaught was built on experience.
I come from a family that stands on business. We’ve built successful marketing agencies from the ground up. My own background is in software engineering and operations, focused on building systems that scale, perform, and hold up under pressure.
That foundation shapes everything I do for my clients. Precision accuracy, and attention to detail.
Annabelle Leishman
Co-Founder
- Information systems and IT-driven systems builder
- Data-first approach to marketing performance
- Oversees client delivery, analytics, and optimization
- Web design and development
- Video editing and content production
- Marketing materials and brand creation
At Onslaught, I design and manage our client delivery systems. From website builds (like this one!) to campaign analytics. Every lead we get is tracked and measured.
Marketing without data is just guessing, and our clients deserve excellence. My role is to ensure every system we deploy is measurable, repeatable, and built to scale.
I’ve spent years at the intersection of technology and creativity, building systems that scale, tracking the metrics that actually matter, and bringing an eye for design and detail that most technical people don’t have. This combination of technical depth and creative thinking is exactly what makes Onslaught excellent.