He had been highly actively involved in the thermal infrared-imaging field since 1976, working in the petrochemical industry as well as providing thermographic consulting, building science, and process automation for infrared equipment manufacturers.

He started the first North American Infrared Training Center for AGA Infrared Systems (now FLIR Systems) in 1979. He spent a number of years developing and bringing to market products for infrared process control and automation in the steel, glass, and metals refining industries.

McIntosh was the manager of Snell Infrared Canada since 1999. In addition to conducting training, he provided engineering support in the company, developed new courseware, and performed research and development in emerging applications.

He wrote training manuals and published practical guides and papers on applied thermography including a chapter in the handbook, The Theory and Practice of Radiation Thermometry. He recently co-authored the “Infrared Thermography Guide” for the Electric Power Research Institute (EPRI).