I think it would be a good idea to contact companies that operate within you husbands field of work to find out more about the sustainable materials industry and potential vacanies suitable for him.
Generally speaking, Calgary has a stronge economy which is growing steadily. The energy sector is the heart of Calgary's job market and anything related to oil is a good field to work in.
You can find out more about job prospects in the city on the Working in Calgary page.
Best of luck with the job hunt.