With three legacy greenhouse companies including Rough Brothers, Nexus Greenhouse Systems, and ThermoEnergy Solutions now united under the Prospiant name, we have unmatched greenhouse and indoor grow manufacturing, design, engineering*, construction, and maintenance capabilities.

The roots of our experience run deep with a heritage that spans more than a century and a half.

Don’t settle for less. Choose Prospiant and leverage the power of true greenhouse and indoor grow structure expertise for your business

We Provide End-to-End Products and Services for Greenhouse and Indoor Growing

Whether you’re just starting your project or it’s already underway, regardless of its scale, we’re here to assist you every step of the way with our premium services.

Image shows the various operating systems that greenhouse construction companies employ to complete projects efficiently

DESIGN your project with expert consultation.

  • Design and consultation services
  • In-house structural and mechanical engineers*
  • Value engineering*

BUILD with turn-key general contracting services

  • Engineering*
  • Greenhouse & indoor grow
  • Site development

INTEGRATE the perfect growing environment

  • Control and zoning systems
  • Automation and growing equipment
  • Heating systems

OPERATE your facilities in optimum condition

  • Operations and maintenance
  • Ongoing support
  • Training and education

Our Vision

Advancing sustainable growth with innovative controlled-environment agriculture structures and systems, promoting conservation-focused food, floral, and cannabis production for a greener future.

Our Mission

Trusted Agtech experts partnering to grow a prosperous and sustainable world.

Backed by Our Historical Legacy

Prospiant stands proudly upon a historical foundation that reaches back for decades.

Three industry-leading brands—Nexus Corporation, Rough Brothers, Inc. (RBI), and ThermoEnergy Solutions—now work together under the Prospiant name to offer a hassle-free experience for growers to access best-in-class growing structures, equipment, and systems from one source.

Prospiant embodies long-term stability with unmatched financial strength and end-to-end expertise gained from more than 150 years of combined business success.

Customers in the following markets rely on our expertise in infrastructure and controlled-environment agriculture (CEA) to help them grow their businesses for long-term success:

  • Produce
  • Floriculture/ornamental production
  • Garden retail
  • Cannabis cultivation
  • Educational institutions
  • Public gardens
  • Research facilities


Rough Brothers, Inc. (RBI) was founded


Nexus Corporation was founded


ThermoEnergy Solutions was founded


Apeks Supercritical was founded


Delta Separations was founded


RBI joined Gibraltar


Nexus Corporation joined Gibraltar


Apeks Supercritical joined Gibraltar


ThermoEnergy Solutions joined Gibraltar


Delta Separations joined Gibraltar


Unified as Prospiant

Prospiant's organizational chart reveals that Rough Brothers, Thermo Energy & Nexus operate under the umbrella of Prospiant
The innovative greenhouse structure showcases Propiant’s craftsmanship as a top-tier greenhouse construction company
Greenhouse contractor complete the construction of a greenhouse facility, designed for lasting functionality and durability
Modern greenhouse facility erected by a professional commercial construction company, emphasizing energy-efficient features
Optimize growth potential with tailored commercial greenhouse construction solutions

Strengthened by Dynamic Leadership

The backbone of our strength lies in our leadership with their extensive expertise and deep insights into the markets we serve in produce, ornamentals/floriculture, cannabis, and public institutions.

Lauren Thomas
Lauren Thomas

Senior Director — Human Resources

Dusty Wilder
Dusty Wilder

VP — Finance

Rudy Magesrevy
Rudy Magasrevy

VP — Operations

Burkhard Metzger
Burkhard Metzger

General Manager — Produce

Bill Pitakos
Bill Pitakos

Director — IT



10983 Leroy Dr, Northglenn, CO 80233


5513 Vine St, Cincinnati, OH 45217


2035 Spinks Dr, Kingsville, ON N9Y 2E5, Canada


We Are a Gibraltar Company

Gibraltar Industries, Inc. (Nasdaq: ROCK), is a leading manufacturer and provider of products and services for the renewable energy, agtech, residential, and infrastructure markets. Gibraltar’s mission is to create compounding and sustainable value with strong leadership positions in higher growth, profitable end markets. Gibraltar’s common stock is a component of the S&P SmallCap 600 and the Russell 2000® Index. More information about Gibraltar can be found on its website at

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