John Proven, President & CEO

President & Chief Executive Officer

Our expertise is directed to providing reliable, class-leading solutions for plant growth, no matter your specific application. We pride ourselves on being flexible and responsive to our clients’ needs while being adept at supporting you over the entire life-cycle of our technologies. Our life-cycle commitment demands that designs support future modifications and often-times, expansion to accommodate your growing needs.

Internally, we judge our performance in the context of you ‘Growing with Confidence’ and you can imagine how that directs our thinking and the things we measure in the process. The theme of clients growing with confidence, permeates our culture and we are proud of it.

As a global business that began in the 1960’s, CEL is dedicated to upholding class-leading standards. Standards that you would expect of a market leader. Enjoy perusing our web site and do not hesitate to reach out to our team who will gladly guide you through the technical decisions for your next successful project.


The CEL Group of Companies

Org Structure

The CEL Group of Companies (CEL) comprises Conviron Canada, Conviron USA, Conviron Europe and Conviron Australia - together forming the world’s leading designer and supplier of controlled environments for plant growth.

CEL Group also includes Argus Controls, one of the leading suppliers of plant-centric environmental controls and automation systems used in greenhouse and indoor growing facilities. Together, Conviron and Argus provide technologies to our clients in the plant science research, commercial horticulture, and plant-derived pharma industry in over 90 countries.

CEL is proud to be part of Madison Air, a Madison Industries company. Madison Industries is one of the largest and most successful privately held companies in the world.

Madison builds entrepreneurially driven, branded market leaders that are committed to making the world safer, healthier and more productive by creating innovative solutions that deliver outstanding customer value. The team at Madison is committed to building something truly remarkable that long outlasts them while coaching others to reach their highest potential.