Nadir started as the first employee of Brian Isherwood in 1987, a niche consultant in the Geostructural field. Isherwood Geostructural Engineers is now widely known as being on the design team for Toronto landmarks such as the CN Tower, the Skydome (Rogers Centre), the Canadian Opera Company, the Sheppard Subway and plays a role in most significant excavations in Ontario. Isherwood is a large player in the North American Geostructural design market and has completed work in Mexico, the Caribbean, across Canada and the US. Nadir has been actively involved with local contractors and developers with the continuation and growth of soil/structure techniques.

After many years at Isherwood, Nadir separated the monitoring services into newly-formed Monir in 2002, to provide a company with the sole focus of monitoring the performance of designed installations.

Nadir is a proud member of over 10 professional associations, including the Tunneling Association of Canada, the Canadian Welding Society, the American Underground Construction Association, the Deep Foundations Institute, and the International Society for Micropiles.