Mark Hubbard

I'm an AI prompt engineer, senior writer, and editor with a proven track record of turning domain expertise into high-performing, AI-assisted content and tools. For the past several years, my focus has been on applied LLM workflows—designing, testing, and refining prompts that deliver accurate, context-aware outputs. Most recently, this has meant owning end-to-end AI content workflows in health, wellness, nutrition, and lifestyle, using ChatGPT, Perplexity, Claude, and Gemini. I use system instructions, few-shot examples, and iterative prompt tuning to reliably generate user-ready content that fits editorial guidelines, SEO goals, and brand voice. One standout project I am working on is a WordPress-ready protein-intake calculator built with Perplexity Labs. For this tool, the prompts ...