Jason Luong is the Principal of Sigma Design LLC, a Phoenix-based digital marketing agency built for small businesses. He has spent 15 years growing businesses organically — search, content, and reputation over paid ads — and started Sigma Design to give small teams the same quality of marketing that bigger companies buy, at a price a small business can actually carry.
His work focuses on four things: SEO that brings in ready-to-buy customers, GEO — getting businesses recommended by AI search tools like ChatGPT — AI call agents that answer every call, and cold email that opens conversations without burning a business's reputation.
On the Sigma Design blog he writes the way he talks to clients: honest timelines, real numbers where they exist, and no hype. If an article here says something takes six months, it is because that is what the work actually takes.