The throughline
This is not a random sequence of pivots. Greg sees the system, understands the people inside it, connects disciplines, and makes the next move practical.
About
A multidisciplinary career built around helping people and ideas take shape.
Greg has worked across education, coaching, strategy, brand, creative technology, AI, entrepreneurship, events, sound, community building, and place. The fields change. The pattern stays consistent.
Learning, technology, and making
Interactive multimedia, a Master of Arts in Teaching, STEAM education, maker programs, and AI literacy all point toward the same question: how do people learn, adapt, and make better decisions with better tools?
Sound, events, and operations
Greg holds two U.S. design patents developed through Recreation Sound Systems, connecting product invention, audio, design, and live experience.
People, place, and systems
Castellanos Coaching, consulting, creative direction, Recreation Experiences, and Make Places Better sit under one umbrella because they all involve people, environments, and decisions that need to become usable.
Recommendation
Mukta Sambrani, a former education colleague, recommends Greg for his technical expertise, creative energy, event management, art and technology education, and multimedia work.
Speaking And Teaching
Topics for schools, parent groups, organizations, retreats, panels, and community events.
Workshops, guest teaching, panels, and practical learning experiences.