Mark LeDonne
Infrastructure, networking & service operations
Triad, NC (local or remote)
Summary
Twenty-plus years running service businesses (appliance repair, dryer vent cleaning, electrical and industrial cooling) combined with a networking and infrastructure background that goes back to the late 1990s. I build scheduling, CRM, and automation tools because I have driven the routes, handled the angry customer with no working dryer, and scheduled thousands of calls. Serenity, my in-house platform, replaced roughly $1,000/month in SaaS subscriptions and now runs Vent Busters day to day, including 2,000+ online bookings in the last seven months across web, email reminders, QR postcards, and quoting.
Experience
Owner / Operator
- Dryer vent cleaning across the Triad: 15,000+ dryer vents handled and 600+ five-star reviews.
- Built Serenity CRM and in-house automation: online booking, voice agents, call routing, reminders, weather alerts, bookkeeping hooks, and marketing integrations.
- 2,000+ online bookings through Serenity in the last seven months. Website, reminder emails, promotional QR postcards, and the quoting module all feed one schedule.
Operations & Systems
- Ran operations for the largest Whirlpool service provider in the Triad. Back office was on clipboards and paper invoices when I arrived.
- Moved the fleet to tablets with streaming schedules, work orders, and payments.
- Modernized three offices across the Triad and Raleigh.
Operations & Systems
- Warranty service for Maytag across NYC and Long Island, one of the largest appliance repair operations in the territory.
- Helped build an industry-first online booking flow used with Sears Roebuck, among the earliest large-scale web scheduling deployments in a dense metro area.
- Put laptops and Verizon aircards in vans for real-time schedule and work-order sync starting in 2004.
- Territory design: zip-code routing, pipeline scheduling, tight daily routes. Problems most modern field-service software still handles poorly.
Selected projects
- Serenity(2020–Present). Multi-tenant CRM and booking platform. Started during COVID lockdowns to replace expensive SaaS; Vent Busters is the flagship tenant.
- Tutorbin(2026). Private AI tutoring app with course-scoped chat, pgvector RAG, and study aids. In daily use.
- Realty Scraper(2026). Shipped browser extension and license API on Chrome Web Store and Firefox Add-ons.
Skills
Operations
- Service business operations
- Field scheduling & territories
- Mobile technician workflows
- Online booking & quoting
Software
- Next.js / TypeScript
- PostgreSQL / Redis
- LLM agents & RAG
- Voice AI (Retell)
Infrastructure
- Linux / Proxmox
- Docker / Coolify
- Tailscale
- Infisical
- Webhook deploys
- Networking (CCNA background)