Builder Stories The Contractor Who Built a Digital Teammate Named Mason AI | Zac O'Hara
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Feb 18, 2026 Zac O'Hara, COO of North Shore Masonry who built Mason AI to automate ops and sales. He talks about turning voice memos into estimates, scraping permits for leads, automating daily reports, and routing tasks to the best AI models. He also covers model comparisons, security tradeoffs, and how AI changes hiring and marketing in trades.
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How North Shore Runs $10M With A Nine Person Core Team
- North Shore Masonry ran ~600 jobs last year and did about $10M revenue with a slim team of ~9–10 employees and 100% subcontracted crews.
- They keep high margins by bringing leads and estimating in-house and building long-term client relationships.
Autonomous Agent Saves Hours By Drafting Change Orders
- Zac built an autonomous AI assistant (Mason) that turns voice memos into JobTread change orders and drafts, cutting 2–3 hours of admin per day.
- The agent uses JobTread's open API, enforces user-level permissions, and queues drafts for human review before sending.
Automate Lead Followup From One Photo
- Use simple inputs like business card photos or short voice notes to trigger multi-step workflows: create contacts, send tailored outreach, add to nurture sequences, and create JobTread todos.
- Zac demonstrated sending a photo that produced a GoHighLevel contact, a custom outreach, a 14-day nurture flow, and a JobTread task automatically.