Rex Halbeisen · Coloradoan

Building the businesses that power what comes next.

Serial entrepreneur, thought leader, mentor, and technologist. For nearly four decades, Rex has built a habit of looking past the horizon and around the corner — spotting where energy, technology, and community are headed before the market catches up. Founder & CEO of The Energy Suite. Co-founder of Enetec and Golden Capital Group. Author and podcast host.

Rex Halbeisen, Founder & CEO of The Energy Suite Est. 1987
1987 Entered the technology industry — later part of the executive team behind the Flexi International Software IPO
17 books Published under The Energy Suite brand, from field guides to technology deep-dives
Serial entrepreneur Companies include Flexi International Software, Rapidigm, Attention Connection, Xfusion, the Shop mobile app, Smart Energy Solutions (now Enetec), and more
Coloradoan Colorado native, still based where the work began
The Ventures

Four ways of building the same idea.

Energy Cooperative

The Energy Suite

An energy technology cooperative platform organized around three pillars — Conservation, Efficiency, and Generation.

Visit The Energy Suite
Smart Energy Technology

Enetec

Smart energy tools and technology, built to bring efficiency and control to homes and businesses.

Visit GoSmart.Energy
Real Estate Investment

Golden Capital Group

A short-term rental investment vehicle turning Colorado real estate into steady, recurring returns.

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Community Initiative

Go Green Community Initiative

A community-level initiative advancing conservation and clean energy access where it's needed most.

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The Library

Seventeen books and counting.

The ETSI series, context guides, and technology deep-dives that make up The Energy Suite body of work — written for members, operators, and anyone building in the energy space.

Browse the library
The Podcast

Conversations that power the grid of tomorrow.

Interviews with the founders, engineers, and innovators shaping the next energy economy — one conversation at a time.

Listen to the show
Get in Touch

Let's build something worth powering.

Speaking engagements, partnerships, podcast guests, and investment conversations — all welcome.