Our Sustainability Commitment

For many years KJWW Engineering and TTG Engineers conducted business and engineered sustainable buildings as a core corporate principle, and we have elevated this principle as an integral part of our business agenda. We are reaffirming IMEG’s commitment to integrate environmentally-friendly policies and practices into our organization by operating in a manner that promotes energy, water, and carbon emissions conservation, as well as waste reduction. We also are committed to assisting our clients in analyzing, reducing, and managing their own environmental impact and risks.


IMEG has built a global reputation for engineering services of high-performance buildings that maximize efficiency and flexibility with forward-thinking design solutions. Our broad array of specialized skills and areas of expertise provide the knowledge our clients require for their unique facility demands.


Experts in the field of sustainability, IMEG holds itself responsible for sustainable design solutions that provide healthy buildings that are aesthetically pleasing, use less energy, deplete fewer natural resources, generate less waste, provide flexible environments for their occupants, and are within the client’s budget. IMEG has embraced the U.S. Green Building Council’s LEED Green Building Rating System as a useful framework for measuring sustainability. We have more than 100 LEED Accredited Professionals and many experienced energy modelers. Sustainability has always been an important aspect of our design philosophy, and we are pleased to have engineered many “firsts” in high-performance design, including:


1st Hospital in U.S. Served by Lake-Coupled Geothermal System

Great River Medical Center - Burlington, IA


Largest Lake-Coupled Geothermal System Serving a Hospital in the U.S.

Sherman Hospital - Elgin, IL


Largest LEED Platinum Office Building in the U.S.

Wellmark Blue Cross Blue Shield – Des Moines


1st Certified LEED Platinum Data Center in the U.S.

ACT – Iowa City, IA


1st Certified LEED Hospital in Wisconsin

Aurora Medical Center – Grafton


1st Certified LEED Hospital in Iowa

Mercy Medical Center – Des Moines


1st Certified LEED Platinum University Building in Illinois

Business Instructional Facility, University of Illinois - Urbana-Champaign


Winner of 3 International ASHRAE Society Technology Awards