The ESTec Group of companies has two major constituents:

Allan R. Nelson Engineering is one of the leading forensic and mechanical engineering groups in Canada, having been used in investigating every major oil sands fire in Canada.

Encore Electronics Inc. is a well established electonics manufacturing company in the US. Encore's products and services are used in a wide variety of engineering, industrial and technology applications including aircraft engine, automotive and turbine testing, product design, research and development, power generation and aerospace electronics.

The ESTec Group of companies has a public listing as ESTec Systems Corp. (TSX Venture Exchange listing symbol ESE)